Jules Tannery (24 March 1848 – 11 December 1910) was a French mathematician, brother of the mathematician and historian of science Paul Tannery, who notably studied under Charles Hermite and was the PhD advisor of Jacques Hadamard.
Under Hermite, he received is doctorate in 1874 for his thesis Propriétés des Intégrales des Équations Différentielle Linéaires à Coefficients Variables.
Tannery discovered a surface of the fourth order of which all the geodesic lines are algebraic. He was not an inventor, however, but essentially a critic and methodologist. He once remarked, "Mathematicians are so used to their symbols and have so much fun playing with them, that it is sometimes necessary to take their toys away from them in order to oblige them to think."
He notably influenced Pierre Duhem, Paul Painlevé, Jules Drach, and Émile Borel to take up science.
His efforts were mainly directed to the study of the mathematical foundations and of the philosophical ideas implied in mathematical thinking. Tannery was "an original thinker, a successful teacher, and a writer endowed with an unusually clear, brilliant and attractive style."^{[1]}
Jules Tannery  

Jules Tannery (18481910). Photo by A. Gerschel & Sons (c. 1866).


Born  24 March 1848 MantessurSeine, France 
Died  11 December 1910 (aged 62) Paris, France 
Residence  France 
Nationality  French 
Alma mater  École Normale Supérieure 
Known for  Philosophy of mathematics 
Scientific career  
Fields  Mathematician 
Institutions  École Normale Supérieure Université de Paris Sorbonne 
Doctoral advisor  Charles Hermite 
Doctoral students  Albert Châtelet Jacques Hadamard 
Influenced  Paul Tannery Paul Painlevé Jules Drach Émile Borel Élie Cartan 
Notes  
Brother of Paul Tannery

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