Given the question: - death place is hamburg , germany    - doctoral students is walter borho , günter harder    - known for is witt matrix , bourbaki -- witt theorem , poincaré -- birkhoff algebra -- witt theorem , witt 's theorem , witt vector , witt group , hasse -- witt    - caption is ernst witt in nice , 1970    - fields is mathematics    - death date is 3 july 1991    - workplaces is university of hamburg    - doctoral advisor is emmy noether      - birth date is 26 june 1911      - image is ernst witt.jpeg    - birth place is alsen , german empire -lrb- present-day denmark -rrb-    - alma mater is university of göttingen    Given the details above, guess who could this information be about.
The answer is:
ernst witt