
 Carl Gustav Jakob Jacobi (Site not responding. Last check: ) 
  Karl Gustav Jacob Jacobi (Potsdam December 10, 1804  Berlin February 18, 1851), was not only a great German mathematician but also considered by many as the most inspiring teacher of his time (Bell, p. 
  Jacobi was also the first mathematician to apply elliptic functions to number theory, for example, proving the polygonal number theorem of Pierre de Fermat. 
  His investigations in elliptic functions, the theory of which he established upon quite a new basis, and more particularly his development of the theta function, as given in his great treatise Fundamenta nova theoriae functionum ellipticarum (KÃ¶nigsberg, 1829), and in later papers in Crelle's Journal, constitute his grandest analytical discoveries. 
 www.abacci.com /wikipedia/topic.aspx?cur_title=C._G._J._Jacobi (670 words) 
