Louis Bachelier

French scientist

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June 18, 2026

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Louis Bachelier was a French scientist who made significant contributions to the theory of probability. In 1900, he was the first to discuss the Brownian motion process, a type of stochastic process. Bachelier was interested in using this mathematical model to describe fluctuations in financial markets. His work on Brownian motion was later expanded upon by Albert Einstein, who used it to explain the irregular movement of colloidal particles. Bachelier also contributed to other areas of mathematics, including functional analysis and partial differential equations.12

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probability theory
Brownian motion process
It was first discussed by Louis Bachelier (1900), who was interested in modeling fluctuations in prices in financial markets, and by Albert Einstein (1905), who gave a mathematical model for the irregular motion of colloidal particles first observed by the Scottish botanist Robert Brown in 1827. The first mathematically rigorous…
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It was first discussed by Louis Bachelier (1900), who was interested in modeling fluctuations in prices in financial markets, and by Albert Einstein (1905), who gave a mathematical model for the irregular motion of colloidal particles first observed by the Scottish botanist Robert Brown in 1827. The first mathematically rigorous…
Read More