caption doctoral_advisor death_date death_place religion birth_place image_size nationality field work_institutions birth_date known_for doctoral_students image article_title name alma_mater
gheorghe Țițeica on a romanian stamp gaston darboux 5 february 1939 bucharest , romania eastern orthodox drobeta-turnu severin , romania 200px romanian mathematics university of bucharest 4 october 1873 differential with robin bullough and roger dodd -rrb- tzitzeica equation geometry tzitzéica ' centro-affine invariant tzitzéica-bullough-dodd equation -lrb- dan barbilian gheorghe titeica -lrb- timbre roumain -rrb- . jpg gheorghe Țițeica
 gheorghe Țițeica university of bucharest , university of paris
gheorghe Țițeica

gheorghe Țițeica -lrb- ; 4 october 1873 in turnu severin -- 5 february 1939 -rrb- publishing as george or georges tzitzeica -rrb- was a romanian mathematician with important contributions in geometry .
he is recognized as the founder of the romanian school of differential geometry .
he showed an early interest in science , as well as music and literature .
Țițeica was an accomplished violinist , having studied music since childhood : music was to remain his hobby .
while studying at the carol i high school in craiova , he contributed to the school 's magazine , writing the columns on mathematics and studies of literary critique .
after graduation he obtained a scholarship at the preparatory school in bucharest , where he also was admitted as a student of the mathematics department of the faculty of sciences .
in june 1895 , he graduated with a `` bachelor of mathematics '' .
in the summer of 1896 , after a stint as a substitute teacher at the bucharest theological seminary , Țițeica passed his exams for promotion to a secondary school position , becoming teacher in galaţi .
in 1897 , on the advice of teachers and friends , Țițeica completed his studies at a preparatory school in paris .
among his mates were henri lebesgue and paul montel .
on june 30 , 1899 he defended his doctoral thesis titled `` sur les congruences cycliques et sur les systemes triplement conjugues '' , on the framework of oblique curvature , before a board of examiners led by gaston darboux .
upon his return to romania , Țițeica was appointed assistant professor at the university of bucharest .
he was promoted to full professor on 4 may 1900 , retaining this position until his death in 1939 .
he also taught mathematics at the polytechnic university of bucharest .
in 1913 , at age 40 , Țițeica was elected as a permanent member of the romanian academy , replacing spiru haret .
later he was appointed in leading roles : in 1922 , vice-president of the scientific section , in 1928 , vice-president and in 1929 secretary general .
Țițeica was also president of the mathematical association of romania , of the romanian association of science and of the association of the development and the spreading of science .
he was a vice-president of the polytechnics association of romania and member of the high council of public teaching .
Țițeica was elected correspondent of the association of sciences of liège and `` doctor honoris causa '' of the university of warsaw .
he was the president of the geometry section at the international congress of mathematicians in toronto -lrb- 1924 -rrb- , zürich -lrb- 1932 -rrb- , and oslo -lrb- 1936 -rrb- .
in 1926 , 1930 and 1937 he gave a series of lectures as titular professor at the faculty of sciences in sorbonne .
he also gave many lectures at the university of brussels -lrb- 1926 -rrb- and the university of rome -lrb- 1927 -rrb- .
the scientific work of Țițeica counts about 400 volumes , of which 96 are scientific projects , most addressing problems of differential geometry .
carrying the researches of the american geometer of german origin ernest wilczynski , Țițeica discovered a new category of surfaces and a new category of curves which now carry his name ; his contributions represent the beginning of a new chapter in mathematics , namely the affine differential geometry .
he also studied r-networks in n-dimensional space , defined through laplace equations .
Țițeica had three children , the last of whom was the physicist Șerban Țițeica .
