Mathematician:Carl Anton Bretschneider

German mathematician who worked in geometry, number theory, and history of geometry.

He also worked on logarithmic integrals and mathematical tables. One of the first mathematicians to use the symbol $\gamma$ for Euler's constant when he published his 1837 paper.

Nationality
German

History

 * Born: 27 May 1808, Gotha, Germany (then in the Ernestine Duchies)
 * Died: 6 November 1878

Theorems and Definitions

 * Bretschneider's Formula