MathOverflow
Dag Oskar Madsen's user avatar
Dag Oskar Madsen's user avatar
Dag Oskar Madsen's user avatar
Dag Oskar Madsen
  • Member for 12 years, 6 months
  • Last seen more than a week ago
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PhD in Mathematics (NTNU, Trondheim, Norway 2002)

FIDE Master in Chess

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62
Unique candidate that fails
28
Is there any position where not promoting (illegally) would be the best move?
28
Short exact sequences every mathematician should know
23
Pawn Promotion Endgame Problem-White to move and mate in 1
23
How do you explain why perpendicular lines have negative reciprocated slopes?