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Jan
15
accepted Plane partitions not containing (1,1,1)
Jan
14
comment Embedding of two-dimensional CW complexes which induces a zero homomorphism on second homotopy groups
Are you sure $K_2\to K_3$ induces a zero map on $\pi_2$? Why?
Jan
13
awarded  Yearling
Jan
12
answered Unifying Geometry for Characteristic Classes
Jan
10
comment Unifying Geometry for Characteristic Classes
(Re: unifying 2 and 4) I don't remember any details but there certainly is an algebraic version of $H(BG)\to H(M)$: the algebraic version of (de Rham complex of) $G\to EG\to BG$ is a contractible complex $\Lambda g[1]\otimes Sg[2]$ — and a connection gives a map from this guy to the de Rham complex of $M$ — something like that...
Jan
9
awarded  Nice Question
Jan
9
revised Plane partitions not containing (1,1,1)
typo in "context 2" fixed
Jan
9
comment Plane partitions not containing (1,1,1)
@Hjalmar Yes, of course, thank you (I'll fix the typo)
Jan
8
asked Plane partitions not containing (1,1,1)
Sep
24
awarded  Autobiographer
Apr
18
comment A map inducing isomorphisms on homology but not on homotopy
(related question @ MSE: math.stackexchange.com/questions/750955)
Jan
11
comment Two kinds of orientability/orientation for a differentiable manifold
Related question on Math.SE
Dec
18
awarded  Commentator
Dec
18
comment sum of the character of the symmetric group
Related: roots of permutations
Nov
13
awarded  Excavator
Nov
13
revised Notions of convergence not corresponding to topologies
broken formatting (near "contains") fixed
Nov
13
suggested approved edit on Notions of convergence not corresponding to topologies
Oct
7
awarded  Constituent
Oct
1
awarded  Caucus
Jun
30
awarded  Informed