Louis Jean-Baptiste Alphonse Bachelier was a French mathematician at the turn of the 20th century. He is credited with being
the first person to model the stochastic process now called Brownian motion, which was part of his PhD thesis The Theory of
Speculation, (published 1900). His thesis, which discussed the use of Brownian motion to evaluate stock options, is historically
the first paper to use advanced mathematics in the study of finance.
