Mathematician:Pafnuty Lvovich Chebyshev

Mathematician
Pafnuty Lvovich Chebyshev (Russian: Пафну́тий Льво́вич Чебышёв) was a Russian mathematician.

His work was mainly in the fields of probability, statistics and number theory.

He is best known for proving Bertrand's Postulate in $1850$. It has since been known as the Bertrand-Chebyshev Theorem.

Nationality
Russian

History

 * Born: May 16, 1821, Okatovo, Borovsk, Kaluga, Russia
 * Died: December 8, 1894, St Petersburg, Russia

Theorems and Definitions

 * Bertrand-Chebyshev Theorem (with )
 * Bienaymé-Chebyshev Inequality (with )
 * Chebyshev Cube Root
 * Chebyshev Distance
 * Chebyshev Filter
 * Chebyshev Function
 * Chebyshev Polynomial
 * Chebyshev's Sum Inequality
 * Chebyshev's Equation
 * Chebyshev Linkage
 * Chebyshev-Markov-Stieltjes Inequalities (with and )
 * Roberts-Chebyshev Theorem (with )
 * Chebyshev's Inequality
 * Chebychev-Grübler-Kutzbach Criterion
 * Chebyshev Node
 * Chebyshev Rational Functions
 * Chebyshev Bias
 * Chebyshev Net
 * Chebyshev-Sylvester Constant (with )

Books and Papers

 * 1847: On integration by means of logarithms
 * 1867: On mean values
 * 1887: On two theorems concerning probability

Notable Quotes

 * To isolate mathematics from the practical demands of the sciences is to invite the sterility of a cow shut away from the bulls.

Critical View

 * He was the only man ever able to cope with the refractory character and erratic flow of prime numbers and confine the stream of their progression within algebraic limits, building up, if I may say so, banks on either side which that stream, devious and irregular as are its windings, can never overflow.

Also known as
His name can also be written as Chebychev, Chebyshov, Tchebycheff or Tschebyscheff. Some sources even use Čebyšev, but modern usage discourages the unnecessary use of diacritics.