Editing Siméon Denis Poisson (section)

== Interaction with Évariste Galois ==
{{See also|Galois theory}}
After political activist [[Évariste Galois]] had returned to mathematics after his expulsion from the École Normale, Poisson asked him to submit his work on the [[theory of equations]], which he did January 1831. In early July, Poisson declared Galois' work "incomprehensible," but encouraged Galois to "publish the whole of his work in order to form a definitive opinion."<ref>{{cite journal|last=Taton|first=R.|year=1947|title=Les relations d'Évariste Galois avec les mathématiciens de son temps|url=http://www.persee.fr/doc/rhs_0048-7996_1947_num_1_2_2607|journal=Revue d'Histoire des Sciences et de Leurs Applications|volume=1|issue=2|pages=114–130|doi=10.3406/rhs.1947.2607}}</ref> While Poisson's report was made before Galois' 14 July arrest, it took until October to reach Galois in prison. It is unsurprising, in the light of his character and situation at the time, that Galois vehemently decided against publishing his papers through the academy and instead publish them privately through his friend Auguste Chevalier. Yet Galois did not ignore Poisson's advice. He began collecting all his mathematical manuscripts while still in prison, and continued polishing his ideas until his release on&nbsp;29 April 1832,<ref name="dupuy">{{cite journal|last=Dupuy|first=Paul|year=1896|title=La vie d'Évariste Galois|url=https://fr.wikisource.org/wiki/Livre:Dupuy_-_La_vie_d'%C3%89variste_Galois.djvu|journal=Annales Scientifiques de l'École Normale Supérieure|volume=13|pages=197–266|doi=10.24033/asens.427|doi-access=free}}</ref> after which he was somehow persuaded to participate in what proved to be a fatal duel.<ref name=":2">{{Cite book|last=C.|first=Bruno, Leonard|url=https://archive.org/details/mathmathematicia00brun|title=Math and mathematicians : the history of math discoveries around the world|publisher=U X L|others=Baker, Lawrence W.|year=2003|isbn=978-0787638139|location=Detroit, Mich.|page=[https://archive.org/details/mathmathematicia00brun/page/173 173]|oclc=41497065|orig-year=1999|url-access=registration}}</ref>