3 lives in this collection worked in theory of equations, from 1540 to today. Each has a full course on their life and the mathematics and physics they made.
Often together with: algebra. All fields
French lawyer and royal councillor who introduced letters for known quantities, founding symbolic algebra and the theory of equations.
algebra, theory of equations, trigonometry
Founder of the mathematical theory of heat conduction, inventor of Fourier series and the Fourier integral, and the first to describe the atmosphere's warming of the Earth.
mathematical physics, heat conduction, fourier analysis
Founder of Galois theory, who linked the solvability of equations by radicals to the structure of their symmetry groups and introduced finite fields.
algebra, group theory, theory of equations