Today (March, 9) in history of Mathematics :

1548: Birth of Biagio Pelacani da Parma, an Italian mathematician who was known for his work on geometry.

1822: Death of Heinrich Wilhelm Matthäus Olbers, a German astronomer and mathematician who is known for his work in astronomy, including his discovery of two asteroids.

1887: Birth of Fritz London, a German physicist who made important contributions to quantum mechanics, including the London equation, which describes the behavior of superconductors.

1906: Birth of Brook Taylor, an American mathematician who is known for his work in differential equations, where he developed the method of undetermined coefficients and Taylor's theorem.

1951: Birth of Michael Freedman, an American mathematician who was awarded the Fields Medal in 1986 for his work on topology, specifically his discovery of exotic spheres.