Christian Kramp

Christian Kramp (8 July 1760 – 13 May 1826) was a French mathematician, who worked primarily with factorials.

In 1795, France annexed the Rhineland area in which Kramp was carrying out his work and after this he became a teacher at Cologne (this city was French from 1794 to 1815), teaching mathematics, chemistry, and physics.

[1] Kramp was appointed professor of mathematics at Strasbourg, the town of his birth, in 1809.

As Bessel, Legendre and Gauss did, Kramp worked on the generalised factorial function which applied to non-integers.

The constant use in combinatorial analysis, in most of my proofs, that I make of this idea, has made this notation necessary.