Reputation
14,090
Next privilege 15,000 Rep.
Protect questions
Badges
47 85
Newest
 Nice Answer
Impact
~368k people reached

Mar
22
awarded  Nice Answer
Mar
7
awarded  Nice Answer
Feb
17
answered Do vanishing characteristic classes of the tangent bundle imply a manifold is stably frameable?
Jan
20
revised Parallelizability of the Milnor's exotic spheres in dimension 7
added 1357 characters in body
Jan
12
awarded  Popular Question
Jan
2
awarded  Good Question
Dec
7
awarded  Nice Answer
Oct
21
awarded  Enlightened
Oct
21
awarded  Nice Answer
Oct
14
answered fiber, homotopy fiber of spaces
Oct
14
comment fiber, homotopy fiber of spaces
No, the Vietoris-Begle theorem only holds for proper maps.
Oct
10
awarded  Yearling
Sep
23
awarded  Nice Answer
Aug
20
awarded  Nice Answer
Aug
15
awarded  Good Answer
Aug
14
awarded  Nice Answer
Jun
28
comment Automorphism group of a fiber bundle surjects onto diffeomorphism group?
If $P$ is a natural fibre bundle, then - by definition - any diffeomorphism is covered by a bundle automorphism.
Jun
14
awarded  Nice Answer
Apr
13
awarded  Nice Answer
Feb
17
revised Homotopy spheres with vanishing and non-vanishing $\alpha$-invariant
added 444 characters in body