# Mathematician:Mathematicians/Sorted By Birth/1701 - 1800 CE

For more comprehensive information on the lives and works of mathematicians through the ages, see the MacTutor History of Mathematics archive, created by John J. O'Connor and Edmund F. Robertson.

*The army of those who have made at least one definite contribution to mathematics as we know it soon becomes a mob as we look back over history; 6,000 or 8,000 names press forward for some word from us to preserve them from oblivion, and once the bolder leaders have been recognised it becomes largely a matter of arbitrary, illogical legislation to judge who of the clamouring multitude shall be permitted to survive and who be condemned to be forgotten.*- -- Eric Temple Bell:
*Men of Mathematics*, 1937, Victor Gollancz, London

- -- Eric Temple Bell:

## $\text {1701}$ – $\text {1710}$

### 1701

#### November

##### Anders Celsius $($$\text {1701}$ – $\text {1744}$$)$

Swedish astronomer, physicist and mathematician whose best known contribution to science was his $1742$ proposal of what is now known as the Celsius temperature scale.
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### 1702

##### Thomas Bayes $($$\text {1702}$ – $\text {1761}$$)$

The **Rev. Thomas Bayes** was a mathematician and Presbyterian minister.

Most famous for his formulation of what is now known as Bayes' Theorem.
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### 1704

#### July

##### Gabriel Cramer $($$\text {1704}$ – $\text {1752}$$)$

Swiss mathematician best known for Cramer's Rule.
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#### August

##### Alexis Fontaine des Bertins $($$\text {1704}$ – $\text {1771}$$)$

French mathematician who contributed to some of the early work on differential equations.

Credited with inventing the technique (independently of Leonhard Paul Euler and Alexis Claude Clairaut) of the use of integrating factors.

Did much of his work independently of others, and questions of precedence arose as a result.
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#### October

##### Johann Andreas Segner $($$\text {1704}$ – $\text {1777}$$)$

Hungarian scientist best known for inventing the Segner wheel.
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#### December

##### Thomas Godfrey $($$\text {1704}$ – $\text {1749}$$)$

American inventor who invented the sextant, independently of John Hadley.

One of the founder members of the American Philosophical Society.
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### 1707

#### April

##### Leonhard Paul Euler $($$\text {1707}$ – $\text {1783}$$)$

Swiss mathematician and physicist who pioneered much of the foundation of modern mathematics.

Introduced much of the notation which is used today, including $e$ and the modern notation for trigonometric functions.
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#### September

##### Georges Louis Leclerc, Comte de Buffon $($$\text {1707}$ – $\text {1781}$$)$

French naturalist, mathematician, cosmologist, and encyclopédiste.

Translated Isaac Newton's works on calculus into French.

His claim to fame in the world of mathematics stems from his thought experiment Buffon's Needle.
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### 1710

#### May

##### Johann II Bernoulli $($$\text {1710}$ – $\text {1790}$$)$

Swiss mathematician who worked mostly on the theory of heat and light.

Son of Johann Bernoulli and the younger brother of Nicolaus II Bernoulli and Daniel Bernoulli.

Father of Johann III Bernoulli and Jakob II Bernoulli.
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#### August

##### Thomas Simpson $($$\text {1710}$ – $\text {1761}$$)$

British mathematician and inventor.

Eponym of Simpson's Rule to approximate definite integrals.
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## $\text {1711}$ – $\text {1720}$

### 1713

#### March

##### Nicolas-Louis de Lacaille $($$\text {1713}$ – $\text {1762}$$)$

French astronomer who named $14$ out of the $88$ constellations.

Observed over $10 \, 000$ stars using just a half-inch refractor.

Constructing astronomical ephemerides and mathematical tables.

Calculated a table of eclipses for $1800$ years.

Determined that Earth is flatter at the South Pole than at the North Pole
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#### May

##### Alexis Claude Clairaut $($$\text {1713}$ – $\text {1765}$$)$

French mathematician, astronomer and geophysicist. Worked out the shape of the Earth.

Best known in mathematics for Clairaut's (differential) equation.

Credited with inventing the technique (independently of Leonhard Paul Euler and Alexis Fontaine des Bertins) of the use of integrating factors.
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### 1717

##### William Ludlam $($$\text {c. 1717}$ – $\text {1788}$$)$

English mathematician and writer on theology who was a fellow of St. John's College, Cambridge.

Credited with first formulating what is now known as Playfair's Axiom.
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#### January

##### Matthew Stewart $($$\text {1717}$ – $\text {1785}$$)$

Scottish mathematician who made significant contributions to the fields of geometry and astronomy.
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#### November

##### Jean le Rond d'Alembert $($$\text {1717}$ – $\text {1783}$$)$

French mathematician, physicist and philosopher best known for his contribution to the Fundamental Theorem of Algebra -- he produced a flawed proof which was later patched up by Gauss.

Devised a technique for solving the linear second order ODE with constant coefficients whose auxiliary equation has repeated roots.
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### 1718

#### May

##### Maria Gaëtana Agnesi $($$\text {1718}$ – $\text {1799}$$)$

Italian mathematician, linguist and philosopher famed for writing the first book discussing both integral and differential calculus.

The curve in analytic geometry called the Witch of Agnesi is named for her.
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## $\text {1721}$ – $\text {1730}$

### 1725

#### September

##### Jean-Étienne Montucla $($$\text {1725}$ – $\text {1799}$$)$

French mathematician and civil servant best known now for his work on the history of mathematics.

Wrote the first comprehensive history of mathematics, uncompleted at the time of his death.
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### 1728

#### August

##### Johann Heinrich Lambert $($$\text {1728}$ – $\text {1777}$$)$

Swiss mathematician, physicist and astronomer.

The first to introduce hyperbolic functions into trigonometry.

Made conjectures regarding non-Euclidean space.

Credited with the first proof that $\pi$ is irrational.
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### 1729

#### January

##### Johann Daniel Titius $($$\text {1729}$ – $\text {1796}$$)$

German astronomer best known for formulating the Titius-Bode Law, and thence to predict the existence of a planet between Mars and Jupiter.

Also active in the field of biology.
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### 1730

#### March

##### Étienne Bézout $($$\text {1730}$ – $\text {1783}$$)$

French mathematician best known for his work in number theory and algebra.

Also the author of widely-used textbooks.
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## $\text {1731}$ – $\text {1740}$

### 1731

#### September

##### Giovanni Francesco Giuseppe Malfatti $($$\text {1731}$ – $\text {1807}$$)$

Italian mathematician best known for posing the Malfatti Problem.

Discovered the Gravitational Property of Lemniscate of Bernoulli.
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#### December

##### Francis Maseres $($$\text {1731}$ – $\text {1824}$$)$

English lawyer, judge, mathematician and historian.

Also at one time the attorney general of the Province of Quebec.

His stance on mathematics was somewhat conservative, to the extent of refusing to accept the validity of negative numbers.
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### 1732

#### July

##### Joseph Jérôme Lefrançois de Lalande $($$\text {1732}$ – $\text {1807}$$)$

French astronomer and writer.
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### 1733

#### May

##### Jean-Charles de Borda $($$\text {1733}$ – $\text {1799}$$)$

French mathematician, physicist, and sailor.

Worked on problems in fluid dynamics.

Developed a ranked preferential voting system, the Borda count.

Constructed the metre based on the measurements of Jean Baptiste Joseph Delambre, thus helping to introduce the metric system to France.
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### 1735

#### February

##### Alexandre-Théophile Vandermonde $($$\text {1735}$ – $\text {1796}$$)$

French mathematician and musician mainly active in the fields of combinatorics.

Referred to by some as "the founder of the theory of determinants".

Best known nowadays for the Vandermonde Determinant and the Chu-Vandermonde Identity.
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### 1736

##### Edward Waring $($$\text {c. 1736}$ – $\text {1798}$$)$

English mathematician mainly active in the fields of number theory and analysis.

Most famous for posing what are now called:

- Waring's Problem
- Waring's Prime Number Conjecture, otherwise known as the Goldbach Conjecture.

#### January

##### James Watt (I) $($$\text {1736}$ – $\text {1819}$$)$

Scottish inventor, mechanical engineer, and chemist best known for his steam engine.
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##### Joseph Louis Lagrange $($$\text {1736}$ – $\text {1813}$$)$

Italian-born French mathematician who made big advances in the fields of the calculus of variations and analytical mechanics.

Contributed to number theory and algebra.

Extended a lot of the fields established by Euler, and in turn laid down the groundwork for later explorations by Gauss and Abel.
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#### June

##### Charles-Augustin de Coulomb $($$\text {1736}$ – $\text {1806}$$)$

French military engineer and physicist.

Best known as the discoverer of what is now called Coulomb's Law.

Did important work on friction.
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### 1737

#### August

##### Charles Hutton $($$\text {1737}$ – $\text {1823}$$)$

English professor at the Royal Military Academy, Woolwich, who wrote a number of arithmetic textbooks.
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## $\text {1741}$ – $\text {1750}$

### 1741

#### August

##### John Wilson $($$\text {1741}$ – $\text {1793}$$)$

English mathematician remembered mainly for Wilson's Theorem, which was in fact published by Edward Waring and came originally from Ibn al-Haytham ("Alhazen").

It was in fact proved by Lagrange in $1793$.
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### 1743

#### February

##### René Just Haüy $($$\text {1743}$ – $\text {1822}$$)$

French priest and mineralogist best known for his work on crystal structure.

Helped establish the metric system.
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### 1744

#### November

##### Johann III Bernoulli $($$\text {1744}$ – $\text {1807}$$)$

Swiss mathematician who worked on probability theory, recurring decimals and the theory of equations.

Son of Johann II Bernoulli and the elder brother of Jakob II Bernoulli.
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### 1745

#### February

##### Alessandro Giuseppe Antonio Anastasio Volta $($$\text {1745}$ – $\text {1827}$$)$

Italian physicist, chemist, and pioneer of electricity and power.

Invented the Voltaic pile in $1799$.

Discovered methane.
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#### June

##### Caspar Wessel $($$\text {1745}$ – $\text {1818}$$)$

Norwegian–Danish mathematician and cartographer who, in $1799$, was the first person to describe the geometrical interpretation of complex numbers as points in the complex plane.
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### 1746

#### May

##### Gaspard Monge $($$\text {1746}$ – $\text {1818}$$)$

French mathematician who invented the field of descriptive geometry.
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### 1747

#### January

##### Johann Elert Bode $($$\text {1747}$ – $\text {1826}$$)$

German astronomer known for his reformulation and popularization of the Titius-Bode Law.

Determined the orbit of Uranus and suggested the planet's name.
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### 1748

#### March

##### John Playfair $($$\text {1748}$ – $\text {1819}$$)$

Scots mathematician and scientific philosopher who was an early proponent of the philosophical position that physical laws are the same throughout the universe and do not change with time.

Also credited with Playfair's axiom, an alternative (and easier to digest) form of Euclid's Fifth Postulate, although he himself did not originate it.
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### 1749

#### March

##### Pierre-Simon de Laplace $($$\text {1749}$ – $\text {1827}$$)$

French mathematician and astronomer whose work greatly influenced the development of the mathematics governing astronomy.

Pioneered the field of mathematical physics.
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#### September

##### Jean Baptiste Joseph Delambre $($$\text {1749}$ – $\text {1822}$$)$

French mathematician and astronomer.

Author of well-known books on the history of astronomy from ancient times to the 18th century.

Placed in charge of the mission to measure the meridian from Dunkirk to Rodez in the south of France, taking over the responsibility from Jean-Dominique de Cassini, who refused the mission for political reasons.

One of the first astronomers to derive astronomical equations from analytical formulas, formulating the trigonometrical identities now known as Delambre's Analogies.
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### 1750

#### May

##### Lorenzo Mascheroni $($$\text {1750}$ – $\text {1800}$$)$

Professor of mathematics at Pavia.

Wrote *Geometria del Compasso*, published in $1797$, in which he showed that any geometrical construction that can be made with compasses and straightedge can also be achieved by using only compasses.

This had, however, already been demonstrated by Georg Mohr in $1672$.

Published in his $1790$ work *Adnotationes ad Calculum Integrale Euleri* a calculation to $32$ places of the value of what is now known as the Euler-Mascheroni Constant.

However, only the first $19$ places were accurate. The rest were corrected in $1809$ by Johann von Soldner.
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## $\text {1751}$ – $\text {1760}$

### 1752

#### September

##### Adrien-Marie Legendre $($$\text {1752}$ – $\text {1833}$$)$

French mathematician, focusing in the fields of statistics, abstract algebra, number theory and analysis.

His work formed the basis for work by many others, including Gauss and Abel.

Gave an early proof of Fermat's Last Theorem for $n = 5$.

Attempted a proof of the Law of Quadratic Reciprocity in $1785$, but it was flawed. It was eventually proven by Gauss in $1798$.
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### 1753

#### May

##### Lazare Nicolas Marguerite Carnot $($$\text {1753}$ – $\text {1823}$$)$

French mathematician, physicist and politician.

Known as the Organizer of Victory in the French Revolutionary Wars and Napoleonic Wars.
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### 1755

#### April

##### Marc-Antoine Parseval $($$\text {1755}$ – $\text {1836}$$)$

French mathematician, most famous for what is now known as Parseval's Theorem, which presaged the unitarity of the Fourier transform.
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### 1757

#### November

##### William Frend $($$\text {1757}$ – $\text {1841}$$)$

English clergyman (later Unitarian), social reformer and writer.

Wrote a few works on mathematics in which, like Francis Maseres, he rejected the use of negative quantities.
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### 1759

#### October

##### Louis François Antoine Arbogast $($$\text {1759}$ – $\text {1803}$$)$

French mathematician, and later politician, who pioneered the concept of discontinuous functions, further developing the work of Leonhard Paul Euler in this field.

This work was developed further by Augustin Louis Cauchy.

The first to conceive the calculus as a set of operational symbols.

Also the first to publish what is now known as Faà di Bruno's Formula.

Responsible for the law which introduced the decimal metric system to France.
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##### Jakob II Bernoulli $($$\text {1759}$ – $\text {1789}$$)$

Swiss mathematician who worked in geometry and mathematical physics.

Son of Johann II Bernoulli and the younger brother of Johann III Bernoulli.
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### 1760

##### Paul Charpit de Ville Coer $($$\text {? c. 1760}$ – $\text {1784}$$)$

French mathematician about whom very little is known, not even his approximate date of birth.

Made some contributions to the science of differential equations, but died before he was able to get anything published.
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#### July

##### Christian Kramp $($$\text {1760}$ – $\text {1826}$$)$

French mathematician working mainly with factorials.

His main claim to fame is for being the one to introduce the Factorial sign: $!$
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## $\text {1761}$ – $\text {1770}$

### 1763

#### February

##### Johann Wilhelm von Camerer $($$\text {1763}$ – $\text {1847}$$)$

German protestant theologian, mathematician, astronomer and historian of mathematics.

Also published an edition of the first six books of Euclid's *The Elements*.
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### 1764

#### November

##### Pieter Nieuwland $($$\text {1764}$ – $\text {1794}$$)$

Dutch nautical scientist, chemist, mathematician and poet.

Has been called the Dutch Isaac Newton.

Known for finding the largest cube that can pass through a hole in a unit cube.
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### 1765

#### June

##### Henry Thomas Colebrooke $($$\text {1765}$ – $\text {1837}$$)$

English mathematician and scholar in Indian culture, best known for his translations of Indian classics.
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#### September

##### Paolo Ruffini $($$\text {1765}$ – $\text {1822}$$)$

Italian mathematician and philosopher.

Most famous for his incomplete proof of what is now known as the Abel-Ruffini Theorem proving the insolubility of the general quintic with radicals.
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#### December

##### Johann Friedrich Pfaff $($$\text {1765}$ – $\text {1825}$$)$

German mathematician who was a precursor of the German school, being a direct influence on Carl Friedrich Gauss.
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### 1766

#### February

##### Thomas Robert Malthus $($$\text {1766}$ – $\text {1834}$$)$

English cleric and scholar, influential in the fields of political economy and demography.
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#### September

##### John Farey $($$\text {1766}$ – $\text {1826}$$)$

English geologist, known for defining the Farey Sequence.
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### 1768

#### March

##### Joseph Fourier $($$\text {1768}$ – $\text {1830}$$)$

French mathematician and physicist best known for the Fourier series and his application of this technique to the problem of heat conduction.

Also developed the technique of dimensional analysis, and discovered the greenhouse effect.
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#### April

##### François Joseph Français $($$\text {1768}$ – $\text {1810}$$)$

French mathematician who worked on partial differential equations.

Also had a career as a soldier in the forces of the French (revolutionary) government of the time.

The brother of Jacques Frédéric Français.
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#### July

##### Jean-Robert Argand $($$\text {1768}$ – $\text {1822}$$)$

Amateur mathematician of Swiss origin, also an accountant and bookseller, best known for the Argand diagram.

Also published, in $1814$, the first complete and rigorous proof of the Fundamental Theorem of Algebra.
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##### François Joseph Servois $($$\text {1768}$ – $\text {1847}$$)$

French mathematician and military officer.

Worked in the fields of projective geometry, functional analysis and complex analysis.

First introduced (in $1814$) the concept of commutativity which till then had generally been taken for granted in all fields of mathematics.
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#### September

##### William Wallace $($$\text {1768}$ – $\text {1843}$$)$

Scottish mathematician and astronomer best known for the Wallace-Bolyai-Gerwien Theorem.
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### 1769

##### Thomas Leybourn $($$\text {c. 1769}$ – $\text {1840}$$)$

Professor of mathematics at the Royal Military College.
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#### August

##### Napoleon Bonaparte $($$\text {1769}$ – $\text {1821}$$)$

Amateur French mathematician also famous as a military and political leader of France (in the same way that Henry Tudor was an amateur singer/songwriter whose hits included *Greensleeves*).
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## $\text {1771}$ – $\text {1780}$

### 1771

#### June

##### Joseph Diez Gergonne $($$\text {1771}$ – $\text {1859}$$)$

French mathematician and logician, best known for founding and editing *Annales de mathématiques pures et appliquées*.
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### 1773

#### March

##### Nathaniel Bowditch $($$\text {1773}$ – $\text {1838}$$)$

American mathematician best known for his work on ocean navigation.
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### 1775

#### January

##### André-Marie Ampère $($$\text {1775}$ – $\text {1836}$$)$

French physicist and mathematician who was one of the founders of the science of classical electromagnetism, which he referred to as "electrodynamics".

Inventor of numerous applications, such as the solenoid (a term coined by him) and the electrical telegraph.
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#### February

##### Farkas Wolfgang Bolyai $($$\text {1775}$ – $\text {1856}$$)$

Hungarian mathematician, mainly known for his work in geometry.
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#### June

##### Jacques Frédéric Français $($$\text {1775}$ – $\text {1833}$$)$

French mathematician whose work was mostly inspired by that of his brother François Joseph Français.

Famous for having published Jean-Robert Argand's work on the use of the complex plane to represent complex numbers.
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### 1776

#### April

##### Marie-Sophie Germain $($$\text {1776}$ – $\text {1831}$$)$

French mathematician who contributed to differential geometry and number theory, and provided some insights into aspects of Fermat's Last Theorem.

She was completely self-taught (as women were not encouraged to do that sort of thing in those days) and contributed her early work under the pseudonym **Monsieur LeBlanc**.

Had Gauss and Lagrange as mentors, but apart from that, suffered throughout her career from prejudice against her gender.
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#### July

##### Johann Georg von Soldner $($$\text {1776}$ – $\text {1833}$$)$

German mathematician, physicist and astronomer.

Calculated the Euler-Mascheroni constant to 24 places.

The first one to predict (100 years before Einstein) that light rays would be bent by the gravitational fields of stars.
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#### August

##### Lorenzo Romano Amedeo Carlo Avogadro $($$\text {1776}$ – $\text {1856}$$)$

Italian scientist, most noted for his contribution to molecular theory now known as Avogadro's Law.
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##### Józef Maria Hoene-Wroński $($$\text {1776}$ – $\text {1853}$$)$

Polish Messianist philosopher, mathematician, physicist, inventor, lawyer, and economist.

Best known for his definition of the Wronskian.
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#### October

##### Peter Barlow $($$\text {1776}$ – $\text {1862}$$)$

English mathematician and physicist, famous for his *New Mathematical Tables*, which would be later republished and known as *Barlow's Tables* and become a standard reference work.

Also (disappointingly) notable for his prediction in $1811$ that no prime greater than $2^{31} - 1$ would ever be discovered.

Also noted for his work on magnetism and strength of materials.
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### 1777

#### January

##### Louis Poinsot $($$\text {1777}$ – $\text {1859}$$)$

French mathematician and physicist best known for his work in geometry and the embryonic field of graph theory.

Invented the field of geometrical mechanics.
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#### Aprol

##### Carl Friedrich Gauss $($$\text {1777}$ – $\text {1855}$$)$

One of the most influential mathematicians of all time, contributing to many fields, including number theory, statistics, analysis and differential geometry.
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### 1779

#### March

##### Benjamin Gompertz $($$\text {1779}$ – $\text {1865}$$)$

British self-educated mathematician and actuary, best known for his Gompertz Law of Mortality, a demographic model published in $1825$.
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### 1780

#### March

##### August Leopold Crelle $($$\text {1780}$ – $\text {1855}$$)$

Self-educated and enthusiastic German mathematician whose most important work was founding *Journal für die reine und angewandte Mathematik*, better known as **Crelle's Journal**.
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#### July

##### Daniel Christian Ludolph Lehmus $($$\text {1780}$ – $\text {1863}$$)$

German mathematician best remembered for the Steiner-Lehmus Theorem.
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## $\text {1781}$ – $\text {1790}$

### 1781

#### June

##### Siméon-Denis Poisson $($$\text {1781}$ – $\text {1840}$$)$

French mathematician and physicist best known for his work in probability theory and differential equations.
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#### October

##### Bernhard Placidus Johann Nepomuk Bolzano $($$\text {1781}$ – $\text {1848}$$)$

Bohemian priest who was also a mathematician, logician, theologian and philosopher.

A major precursor of the wave of development of analysis in the late $19$th century.

Proved the Bolzano-Weierstrass Theorem, independently of (and earlier than) Karl Weierstrass.

Gave the first analytical proof of the Intermediate Value Theorem (which is also known as Bolzano's Theorem).
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### 1783

#### December

##### Charles Julien Brianchon $($$\text {1783}$ – $\text {1864}$$)$

French mathematician and chemist who took up a career in Napoleon's artillery.

With Jean-Victor Poncelet, proved the Nine Point Circle Theorem in $1820$.
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### 1784

#### July

##### Friedrich Wilhelm Bessel $($$\text {1784}$ – $\text {1846}$$)$

Prussian mathematician best known for making a systematic study of what is now known as Bessel's equation.
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### 1786

#### February

##### Jacques Philippe Marie Binet $($$\text {1786}$ – $\text {1856}$$)$

French mathematician best known for his contribution to the Binet-Cauchy Identity.

Recognized as the first to define the rules for matrix multiplication.
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##### Dominique François Jean Arago $($$\text {1786}$ – $\text {1853}$$)$

French mathematician, physicist, astronomer and politician.

Worked in the field of optics with Augustin-Jean Fresnel.

First person to construct an electromagnet.

As an active practical astronomer and geographer in troubled political times, once found himself arrested on charges of espionage.
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### 1787

#### November

##### Magnus Georg Paucker $($$\text {1787}$ – $\text {1855}$$)$

Russian astronomer and physicist best known for his construction of the regular $257$-gon using a compass and straightedge.
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### 1788

##### Edward Riddle $($$\text {1788}$ – $\text {1854}$$)$

English mathematician and astronomer.
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#### May

##### Augustin-Jean Fresnel $($$\text {1788}$ – $\text {1827}$$)$

French civil engineer and physicist, whose research in optics led to the almost universal acceptance of the wave theory of light in the 19th century.
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#### July

##### Jean-Victor Poncelet $($$\text {1788}$ – $\text {1867}$$)$

French mathematician and engineer who revived the field of projective geometry.

With Charles Julien Brianchon, proved the Nine Point Circle Theorem in $1820$.
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### 1789

#### March

##### Georg Simon Ohm $($$\text {1789}$ – $\text {1834}$$)$

German physicist and mathematician best remembered for Ohm's Law.
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#### August

##### Augustin Louis Cauchy $($$\text {1789}$ – $\text {1857}$$)$

French Engineer and mathematician, from a suburb of Paris, which at the time was home to many leading mathematicians.

Wrote seven books and more than 700 papers in various fields of mathematics.

Made significant contributions in number theory, the theory of determinants, eigenvalues, ordinary and partial differential equations, permutation groups, and the foundation of calculus.

Famous for founding the theory of functions of a complex variable.

Argued by some as the *founder of group theory*.
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### 1790

#### November

##### August Ferdinand Möbius $($$\text {1790}$ – $\text {1868}$$)$

German mathematician and theoretical astronomer, active in geometry and number theory.

Best known for inventing the Möbius Strip, although this was actually invented independently by Johann Benedict Listing at around the same time.
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## $\text {1791}$ – $\text {1800}$

### 1791

#### September

##### Michael Faraday $($$\text {1791}$ – $\text {1867}$$)$

English scientist who contributed to the study of electromagnetism and electrochemistry.

His main discoveries include the principles underlying electromagnetic induction, diamagnetism and electrolysis.
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#### October

##### Victor-Amédée Lebesgue $($$\text {1791}$ – $\text {1875}$$)$

French mathematician working on number theory. He was elected a member of the Académie des sciences in 1847.
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##### Wilhelm August Förstemann $($$\text {1791}$ – $\text {1836}$$)$

German mathematician best known for his textbooks, which were standard German grammar schools texts for some considerable time.

Published a series of articles on on the task of rationalizing equations.
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#### December

##### Charles Babbage $($$\text {1791}$ – $\text {1871}$$)$

English mathematician, philosopher, inventor and mechanical engineer.

Originated, together with Ada Lovelace, the concept of a programmable computer.
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### 1792

#### May

##### Martin Ohm $($$\text {1792}$ – $\text {1872}$$)$

German mathematician who was the first to fully develop the theory of the exponential $a^b$ when both $a$ and $b$ are complex numbers.

Attempted to reform mathematical education by taking a rigorous approach from first principles.
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#### December

##### Nikolai Ivanovich Lobachevsky $($$\text {1792}$ – $\text {1856}$$)$

Known as "the Copernicus of geometry", for his development of a non-Euclidean geometry, that is, one which does not use the parallel postulate.
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### 1793

#### April

##### Dionysius Lardner $($$\text {1793}$ – $\text {1859}$$)$

Irish scientific writer and populariser of science.
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#### May

##### Jakob Philipp Kulik $($$\text {1793}$ – $\text {1863}$$)$

Austrian mathematician known for his construction of mathematical tables.

A table containing the factors of all integers up to $100 \, 000 \, 000$, which he had spent $20$ years working on as a hobby, remained uncompleted and unpublished at his death.
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#### July

##### George Green $($$\text {1793}$ – $\text {1841}$$)$

Famously (and mystifyingly) self-taught English mathematical physicist best known for Green's Theorem.

Did pioneering work on electromagnetism.
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#### November

##### Michel Chasles $($$\text {1793}$ – $\text {1880}$$)$

French mathematician known for his work in projective geometry, as well as for his contributions to harmonic analysis.
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### 1794

#### April

##### Germinal Pierre Dandelin $($$\text {1794}$ – $\text {1847}$$)$

French mathematician, soldier, and professor of engineering, best known for Dandelin spheres.
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#### May

##### William Whewell $($$\text {1794}$ – $\text {1866}$$)$

English polymath, scientist, Anglican priest, philosopher, theologian, and historian of science.

Originator of many new scientific terms, including **ion**, **cathode**, **Eocene**, **Miocene**, **physicist**, and **scientist**.
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### 1795

#### February

##### Giuliano Frullani $($$\text {1795}$ – $\text {1834}$$)$

Italian mathematician interested in definite integrals and infinite series.
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#### July

##### Gabriel Léon Jean Baptiste Lamé $($$\text {1795}$ – $\text {1870}$$)$

French mathematician who investigated curvilinear coordinate systems.

Studied the series of curves now known as Lamé curves.
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#### October

##### Benjamin Olinde Rodrigues $($$\text {1795}$ – $\text {1851}$$)$

French banker, mathematician, and social reformer.
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### 1796

#### February

##### Lambert Adolphe Jacques Quetelet $($$\text {1796}$ – $\text {1874}$$)$

Belgian astronomer, mathematician, statistician and sociologist.

Founded and directed the Brussels Observatory.

Influential in introducing statistical methods to the social sciences.

Founded the science of anthropometry and developed the body mass index scale, originally called the Quetelet index.
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#### March

##### Jakob Steiner $($$\text {1796}$ – $\text {1863}$$)$

Swiss mathematician who worked extensively (and mainly) in geometry.

He made an important contribution to combinatorics with his Steiner system, a kind of block design.
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#### June

##### Nicolas Léonard Sadi Carnot $($$\text {1796}$ – $\text {1832}$$)$

French military scientist and physicist, often described as the "father of thermodynamics".

Published the first successful theory of the maximum efficiency of heat engines.
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#### August

##### Irénée-Jules Bienaymé $($$\text {1796}$ – $\text {1878}$$)$

French mathematician mainly working in statistics, whose work can be considered as extending the work of Laplace.
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#### November

##### Andreas Freiherr von Ettingshausen $($$\text {1796}$ – $\text {1878}$$)$

German mathematician and physicist.

The first to build an electromagnetic machine.

Invented the notation $\dbinom n k$ for the binomial coefficient.
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### 1797

#### June

##### Rehuel Lobatto $($$\text {1797}$ – $\text {1866}$$)$

Dutch mathematician who contributed towards the development of solutions to differential equations.

Developer of the Gauss-Lobatto Quadrature Method.
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#### December

##### Joseph Henry $($$\text {1797}$ – $\text {1878}$$)$

American scientist who discovered the electromagnetic phenomenon of self-inductance.

Discovered mutual inductance independently of Michael Faraday.

Developed the electromagnet into a practical device.
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### 1798

#### January

##### Karl Georg Christian von Staudt $($$\text {1798}$ – $\text {1867}$$)$

German mathematician best known for his book *Geometrie der Lage*, an important work in the development of the discipline of projective geometry.
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#### March

##### Pierre Frédéric Sarrus $($$\text {1798}$ – $\text {1861}$$)$

French mathematician who discovered a mnemonic rule for solving the determinant of a 3-by-3 matrix, named Sarrus' Scheme.

Demonstrated the Fundamental Lemma of the Calculus of Variations.

Discovered Fermat pseudoprimes to base $2$, now known as Sarrus numbers or Poulet numbers.
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#### October

##### Heinrich Ferdinand Scherk $($$\text {1798}$ – $\text {1885}$$)$

German mathematician notable for his work on minimal surfaces and the distribution of prime numbers.
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### 1799

##### Camille-Christophe Gerono $($$\text {1799}$ – $\text {1891}$$)$

French mathematician concerned mainly with geometry.
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#### April

##### Fortuné Landry $($$\text {1799}$ – $\text {1895}$$)$

French mathematician mainly working in the field of factorization of large integers.
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### 1800

#### May

##### Karl Wilhelm Feuerbach $($$\text {1800}$ – $\text {1834}$$)$

German geometer best known for Feuerbach's Theorem.

Introduced homogeneous coordinates in $1827$, independently of August Ferdinand Möbius.
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