Christian Reiher

German mathematician (born 1984)

Christian Reiher
Reiher in Oberwolfach, 2012
Born	(1984-04-19) 19 April 1984 (age 40) Starnberg, Bavaria, West Germany
Nationality	German
Alma mater	University of Rostock LMU Munich
Known for	Proving Kemnitz's conjecture
Awards	European Prize in Combinatorics (2017)
Scientific career
Fields	Mathematics
Institutions	University of Hamburg
Doctoral advisor	Hans-Dietrich Gronau

Christian Reiher (born 19 April 1984 in Starnberg) is a German mathematician. He is the fifth most successful participant in the history of the International Mathematical Olympiad, having won four gold medals in the years 2000 to 2003 and a bronze medal in 1999.

Just after finishing his Abitur, he proved Kemnitz's conjecture, an important problem in the theory of zero-sums. He went on to earn his Diplom in mathematics from the Ludwig Maximilian University of Munich.

Reiher received his Dr. rer. nat. from the University of Rostock under supervision of Hans-Dietrich Gronau [de] in February 2010 (Thesis: A proof of the theorem according to which every prime number possesses property B) and works now at the University of Hamburg.

Selected publications

——— (2007), "On Kemnitz' conjecture concerning lattice-points in the plane", The Ramanujan Journal, 13 (1–3): 333–337, arXiv:1603.06161, doi:10.1007/s11139-006-0256-y, S2CID 119600313.