What is Siméon Denis Poisson?
{{Infobox scientist |name = Siméon Poisson |image = Simeon_Poisson.jpg |image_size = 200px |caption = Siméon Denis Poisson (1781-1840) |birth_date = {{Birth date|1781|6|21|df=yes}} |birth_place = [[Pithiviers]], [[Loiret]] |death_date = {{Death date and age|1840|4|25|1781|6|21|df=yes}} |death_place = [[Sceaux, Hauts-de-Seine]] |nationality = [[France]] |fields = [[Mathematics]] |workplaces = [[École Polytechnique]]<br>[[Bureau des Longitudes]]<br>[[Faculte des Sciences|Faculté des Sciences]]<br>[[École Spéciale Militaire de Saint-Cyr|École de Saint-Cyr]] |alma_mater = [[École Polytechnique]] |doctoral_advisor = [[Joseph Louis Lagrange]]<br>[[Pierre-Simon Laplace]] |academic_advisors = |doctoral_students = [[Michel Chasles]]<br>[[Johann Peter Gustav Lejeune Dirichlet|Lejeune Dirichlet]]<br>[[Joseph Liouville]] |notable_students = [[Nicolas Léonard Sadi Carnot]] |known_for = [[Poisson process]]<br>[[Poisson equation]]<br>[[Poisson kernel]]<br>[[Poisson distribution]]<br>[[Poisson bracket]]<br>[[Poisson regression]]<br>[[Poisson summation formula]]<br>[[Arago spot|Poisson's spot]]<br>[[Poisson's ratio]]<br>[[Most probable number|Poisson zeros]]<br>{{nowrap|[[Conway–Maxwell–Poisson distribution]]}}<br>[[Euler–Poisson–Darboux equation]] |awards = }} '''Siméon Denis Poisson''' ( 21 June 1781 in [[Pithiviers]] - 25 April 1840 in [[Sceaux, Hauts-de-Seine|Sceaux]], near [[Paris]]) was a [[France|French]] [[mathematician]] and [[physicist]]. From 1798 he studied mathematics at the [[École Polytechnique]], where he met [[Pierre-Simon Laplace]] and [[Joseph-Louis Lagrange]]. In 1802 he became [[professor]], in 1806 he took the position [[Jean Baptiste Joseph Fourier]] had before him. [[Napoleon]] sent Fourier to [[Grenoble]]. Poisson was a disciple of Laplace. Poisson worked on the mathematical bases of [[Wave (physics)|wave theory]], [[acoustics]], [[Elasticity (physics)|elasticity]], [[electricity]] and