Siméon Denis Poisson

Baron Siméon Denis Poisson FRS FRSE was a French mathematician and physicist who worked on statistics, complex analysis, partial differential equations, the calculus of variations, analytical mechanics, electricity and magnetism, thermodynamics, elasticity, and fluid mechanics. Moreover, he predicted the Arago spot in his attempt to disprove the wave theory of Augustin-Jean Fresnel.

21 June 1781

Born on the same birth day (21 June): Antonia Mesina • Cristiano Lupatelli • Dae-ho Lee • Diane Marleau • Ewen McKenzie • Fiorella Mari • Flavio Roma • Friedrich Curschmann • Iztok Mlakar • Jean Laplanche • Jim Breuer • Johann Christoph Friedrich Bach • Jussie Smollett • Kathleen O'Kelly-Kennedy • Larisa Avdeyeva • Manu Chao • Matt Kuchar • Michael Ruse • Pontus Hultén • Pope Leo IX • Robert Menasse • Sentayehu Ejigu • Tchan Fou-li

Born in the same month (June 1781): Christian Lobeck • George Stephenson