Mathematician:Evangelista Torricelli

Mathematician
Italian physicist and mathematician, best known for inventing the barometer.

Disciple of.

Gave his name to Torricelli's Law. Studied the properties of the figure in solid geometry known as Gabriel's horn, also now known as Torricelli's trumpet. Discovered in $1643$ that it has finite volume.

Used an improved form of 's method of indivisibles.

Discovered in $1644$ the area of the cycloid.

Discovered in $1645$ the exact length of the inner portion of the logarithmic spiral.

Possibly the first to notice the relationship between differential calculus and integral calculus now recognised as the Fundamental Theorem of Calculus.

The first to understand air pressure and the nature of a vacuum.

Close friend of.

Corresponded with and  in Paris.

Nationality
Italian

History

 * Born: 15 Oct 1608, Faenza, Romagna (now Italy)
 * 1642: Assistant and secretary to in his last days
 * Died: 25 Oct 1647, Florence, Tuscany (now Italy)

Theorems and Definitions

 * Torricelli's Law
 * Torricelli's Equation
 * Fermat-Torricelli Point (with ), also known as a Fermat Point or a Torricelli Point
 * Torricelli's Trumpet
 * Torr (unit of pressure)

Publications

 * 1644: Opera Geometrica

Critical View

 * To us his incredible genius seems almost miraculous.