3 lives in this collection worked in hydraulic engineering, from 1526 to today. Each has a full course on their life and the mathematics and physics they made.
Bolognese engineer whose L'Algebra (1572) gave the first rules for calculating with complex numbers, resolved the irreducible case of the cubic, and introduced Diophantus's problems to Western readers.
algebra, complex numbers, number theory
Observational astronomer who discovered four moons of Saturn and the Cassini division, measured planetary rotation and the solar parallax, and founded a dynasty that directed the Paris Observatory.
astronomy, planetary science, geodesy
Engineer officer who founded modern projective geometry with his 1822 Traité and made work the central concept of the mechanics of machines.
projective geometry, applied mechanics, hydraulic engineering