Genus Dirichletia
Pictures from Observations
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For Johann Peter Gustav Lejeune Dirichlet (1805–1859), German mathematicial prodigy. He studied under the French mathematician Jean Nicolas Pierre Hachette at the Faculté des Sciences de Paris (1816–1822). When just 22 he provided a partial proof for Fermat’s Last Theorem and was immediately offered a post at the University of Breslau (1827), then later at the Prussian Military Academy, the University of Berlin (1931), and the University of Gōttingen (1855). His main research interest was number theory. He pioneered many new concepts, publishing Dirichlet’s Theorem on Arithmetic Progressions, Dirichlet Character and Functions, and proved the Dirichlet unit theorem, and more. He became a member of the Prussian Academy of Sciences in 1805 aged 27.