Philipp Ludwig von Seidel
Philipp Ludwig von Seidel was a German mathematician. He was the son of Julie Reinhold and Justus Christian Felix Seidel.
Lakatos credits von Seidel with discovering, in 1847, the crucial analytic concept of uniform convergence, while analyzing an incorrect proof of Cauchy's.
In 1857, von Seidel decomposed the first order monochromatic aberrations into five constituent aberrations. They are now commonly referred to as the five Seidel Aberrations.
The lunar crater Seidel is named after him.
The Gauss–Seidel method is a useful numerical iterative method for solving linear systems.