Cauchy

Etymology
From.

Proper noun

 * 1) ; notably that of prolific mathematician  (1789-1857).

Usage notes

 * Used attributively in various terms in mathematics to imply association with the work of Augustin-Louis Cauchy, although often the most direct association is to another such term.

Adjective

 * 1)  Whose terms become arbitrarily close to one another.