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Johannes Nordström's user avatar
Johannes Nordström's user avatar
Johannes Nordström
  • Member for 13 years, 2 months
  • Last seen more than a month ago
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answer
22
Chern-Weil Theory for $p_1$
May 21, 2014
answer
17
A 4-manifold with Stiefel-Whitney classes $w_1\neq 0$, $w_3 \neq 0$, and $w_1^2=0$?
Jan 12, 2017
answer
15
Why do I need densities in order to integrate on a non-orientable manifold?
Mar 7, 2012
answer
9
Chern classes of a blow-up at a point
Mar 30, 2012
answer
9
Almost parallelizable 4-manifolds
Jan 1, 2013
answer
9
Steenrod powers of Pontryagin classes
Jun 17, 2017
answer
8
The vanishing of the 2nd plurigenus of a sextic threefold
Feb 21, 2011
question
7
A lost lemma about periodicity in a grid of long exact sequences?
Jan 3, 2013
answer
6
Poincaré duality with boundary conditions
Feb 20, 2011
answer
6
(Second) Chern class of projective space, blown up in a linear subvariety
Mar 7, 2012