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Carl Spitzweg 021.jpg
deDieser Benutzer spricht Deutsch als Muttersprache.
en-4This user can contribute with a near-native level of English.
fr-1Cet utilisateur peut contribuer avec un niveau élémentaire de français.
Flag of Europe.svgThis user lives in the UK.
Tutnum7.jpgThis editor is a Labutnum of the Encyclopedia and is entitled to display this Book of Knowledge with Coffee Cup Stain, Cigarette Burn, Chewed Broken Pencil, Sticky Note, Bookmark, and Note from Jimbo.
≤4This user is a mathematician with an Erdős number of at most 4.
Sock puppetting.pngThis user has used the alternate account Kusma using AWB.

I am a German mathematician living in Nottingham, a Wikipedian since 2004 and a Wikipedia administrator since 2006 (34452 edits, 16245 deletions, 1073 blocks, 199 protections).