{{Use dmy dates|date=November 2022}} {{short description|German mathematician (born 1984)}} {{ Infobox scientist | name = Christian Reiher | image = Christian reiher.jpg | image_size = | caption = Reiher in Oberwolfach, 2012 | birth_date = {{birth date and age|1984|04|19|df=y}} | birth_place = Starnberg, Bavaria, West Germany | death_date = | death_place = | fields = Mathematics | workplaces = University of Hamburg | alma_mater = University of Rostock<br>LMU Munich | doctoral_advisor = Hans-Dietrich Gronau | doctoral_students = | known_for = Proving Kemnitz's conjecture | awards = European Prize in Combinatorics (2017) }} '''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.<ref>{{IMO results |id=5636}}</ref>
Just after finishing his ''Abitur'', he proved Kemnitz's conjecture, an important problem in the theory of zero-sums.<ref>See reviews of {{harvtxt|Reiher|2007}} by Christian Elsholtz, {{MR|2281170}}, and Arnfried Kemnitz, {{zbl|1126.11011}}</ref> He went on to earn his Diplom in mathematics from LMU Munich.
Reiher received his Dr. rer. nat. from the University of Rostock under supervision of {{ill|Hans-Dietrich Gronau|de|Hans-Dietrich Gronau (Mathematiker)}} in February 2010 (Thesis: ''A proof of the theorem according to which every prime number possesses property B'')<ref>{{MathGenealogy |id=148081 }}</ref> and works now at the University of Hamburg.<ref>{{citation|url=https://www.math.uni-hamburg.de/home/reiher/|title=Christian Reiher|work=Mathematics Staff|date=8 September 2023 |publisher=University of Hamburg|access-date=2024-05-22}}</ref>
==Selected publications== *{{Citation |last=Reiher |first=Christian |author-mask=3 |title=On Kemnitz' conjecture concerning lattice-points in the plane |journal=The Ramanujan Journal |volume=13 |issue=1–3 |year=2007 |doi=10.1007/s11139-006-0256-y |pages=333–337 |arxiv=1603.06161 |s2cid=119600313 }}.
==References== {{reflist}}
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{{DEFAULTSORT:Reiher, Christian}} Category:1984 births Category:Living people Category:People from Starnberg Category:21st-century German mathematicians Category:LMU Munich alumni Category:University of Rostock alumni Category:International Mathematical Olympiad participants
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