The story
Named after French mathematician Augustin-Louis Cauchy (1789–1857), who made pioneering contributions to analysis.
Etymology from Wiktionary, CC BY-SA 4.0.
Cauchy sequence
Today it means: Any sequence x_n in a metric space with metric d such that for every ϵ>0 there exists a natural number N such that for all k,m>N, d(x_k,x_m)<ϵ. Full definition →