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Mar
14
awarded  Popular Question
Feb
12
comment What out-of-print books would you like to see re-printed?
@chs21259 Try following the links from: google.com/… I assume you know this, but the word for "download" is "скачать" :).
Oct
15
awarded  Yearling
Sep
24
awarded  Nice Answer
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awarded  Good Answer
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awarded  Nice Answer
Mar
11
comment How should one think about pushforward in cohomology?
I am confused by your answer in the case of n negative (e.g. if f is a submersion). In this case, your description seems to imply that $f_!$ is always zero, which it shouldn't be. Is there a way to fix this?
Nov
12
revised Algebraic Topology Beyond the Basics:Any Texts Bridging The Gap?
added 438 characters in body
Oct
15
awarded  Yearling
Aug
8
comment Classify $\mathbb{R}^n$-bundles
As far as I understand, the difference between "Homeo(R^n)" and O(n) is studied quite a bit. See the introduction to the following paper of A. Ranicki & M. Weiss: arxiv.org/pdf/0901.0819v2.pdf. In particular, they claim that it is known that rational cohomology of BHomeo and BO are the same, but I've heard Weiss talk about how this is a difficult problem integrally (if I remember right).
Feb
8
awarded  Self-Learner
Nov
3
revised Fields of mathematics that were dormant for a long time until someone revitalized them
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Nov
3
comment Best Algebraic Geometry text book? (other than Hartshorne)
I think it is important to have links to the newest version: math216.wordpress.com and actual PDFs at math.stanford.edu/~vakil/216blog.
Oct
16
awarded  Yearling