doctoral_advisor death_place death_date birth_place fields workplaces birth_date known_for doctoral_students article_title name alma_mater
felix klein giessen , hessen , nazi germany 29 september 1941 lugau , kingdom of saxony , german confederation mathematics university of leipzig university of greifswald university of giessen 26 december 1861 engel group engel expansion engel theorem abraham plessner friedrich engel -lrb- mathematician -rrb-
 friedrich engel university of leipzig university of berlin
friedrich engel -lrb- mathematician -rrb-

friedrich engel -lrb- december 26 , 1861 -- september 29 , 1941 -rrb- was a german mathematician .
engel was born in lugau , saxony , as the son of a lutheran pastor .
he attended the universities of both leipzig and berlin , before receiving his doctorate from leipzig in 1883 .
engel studied under felix klein at leipzig , and collaborated with sophus lie for much of his life .
he worked at leipzig -lrb- 1885 -- 1904 -rrb- , greifswald -lrb- 1904 -- 1913 -rrb- , and giessen -lrb- 1913 -- 1931 -rrb- .
he died in giessen .
engel was the co-author , with sophus lie , of the three volume work `` theorie der transformationsgruppen '' -lrb- publ .
1888-1893 ; tr. , `` theory of transformation groups '' -rrb- .
engel was the editor of the collected works of sophus lie with 6 volumes published between 1922 and 1937 ; the seventh and final volume was prepared for publication but appeared almost twenty years after engel 's death .
he was also the editor of the collected works of hermann grassmann .
engel translated the works of nikolai lobachevski from russian into german , thus making these works more accessible .
with paul stäckel he wrote a history of non-euclidean geometry -lrb- `` theorie der parallellinien von euklid bis auf gauss '' , 1895 -rrb- .
with his former student karl faber , he wrote a book on the theory of partial differential equations of the first order using methods of lie group theory .
in 1910 engel was the president of the deutsche mathematiker-vereinigung .
