Pierre de Fermat
Proposed the principle of least time, suggesting light travels between two points in the shortest possible time, which led to Snell's Law.
Videos Mentioning Pierre de Fermat

The Closest We’ve Come to a Theory of Everything
Veritasium
Proposed the principle of least time, suggesting light travels between two points in the shortest possible time, which led to Snell's Law.

Edward Frenkel: Reality is a Paradox - Mathematics, Physics, Truth & Love | Lex Fridman Podcast #370
Lex Fridman
French mathematician who conjectured Fermat's Last Theorem in the 17th century, famously claiming to have a proof but that the margin of his book was too small to contain it, sparking 350 years of mathematical quest.

Jordan Ellenberg: Mathematics of High-Dimensional Shapes and Geometries | Lex Fridman Podcast #190
Lex Fridman
Early number theorist who famously wrote a note about his 'last theorem' and devised a primality test.

Luís and João Batalha: Fermat's Library and the Art of Studying Papers | Lex Fridman Podcast #209
Lex Fridman
A French lawyer and mathematician who famously scribbled his 'Last Theorem' in the margin of a book, inspiring the name for Fermat's Library.