Greg Friedman's user avatar
Greg Friedman's user avatar
Greg Friedman's user avatar
Greg Friedman
  • Member for 13 years, 9 months
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7 votes
0 answers
287 views

Do smooth maps with nowhere-maximal rank have small image?

8 votes
0 answers
687 views

Homology of inverse limits over inverse systems more complicated than towers

7 votes
2 answers
755 views

Where can I find resources for creating a mathematics "bridge course"?

18 votes
5 answers
2k views

References for Eilenberg-Zilber shuffle product

2 votes
0 answers
191 views

Are open convex PL subsets of R^n PL homeomorphic to R^n?

5 votes
0 answers
472 views

Alternative approaches to the universal coefficient theorem

9 votes
1 answer
512 views

Signs and functoriality of tensor products

13 votes
2 answers
953 views

What characteristic class information comes from the 2-torsion of $H^*(BSO(n);Z)$?

7 votes
2 answers
419 views

Are there oriented $4k+2$ manifolds such that $im(H_{2k+1}(M; Z/2)\to H_{2k+1}(M, \partial M; Z/2))$ has odd dimension?

7 votes
1 answer
547 views

When do we need the axiom of compact support for a homology theory to be uniquely defined?

28 votes
2 answers
6k views

What group is $\langle a,b \,| \, a^2=b^2 \rangle$?

10 votes
1 answer
540 views

Ranicki symmetric L-groups of finite fields?

12 votes
1 answer
2k views

Conventions for definitions of the cap product

8 votes
3 answers
947 views

What is a principal refinement of a Postnikov system?

9 votes
1 answer
1k views

How does the Lefschetz-Poincare dual torsion linking pairing on manifolds with boundary interact with the maps of the long exact sequence of the manifold-boundary pair?