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Greg Friedman's user avatar
Greg Friedman's user avatar
Greg Friedman's user avatar
Greg Friedman
  • Member for 14 years, 6 months
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About
I'm a topologist, specializing in stratified spaces and intersection homology. I've also done some work on high dimensional knot theory, particularly PL singular knots and disk knots.
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Top posts
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answer
35
What (if anything) happened to Intersection Homology?
Jun 8, 2010
answer
31
References for sign conventions in homological algebra
Jan 26, 2011
answer
29
Short exact sequences every mathematician should know
Jun 22, 2020
question
28
What group is $\langle a,b \,| \, a^2=b^2 \rangle$?
Dec 13, 2010
answer
20
Two points of view about Borel-moore homology
Sep 8, 2016
question
19
References for Eilenberg-Zilber shuffle product
Oct 8, 2012
answer
16
So what exactly are perverse sheaves anyway?
Dec 30, 2019
answer
15
Any shortcuts to understanding the properties of the Riemannian manifolds which are used in the books on algebraic topology
Jan 6, 2021
answer
14
Singular Homology/Cohomology as a derived functor?
May 30, 2011
question
13
What characteristic class information comes from the 2-torsion of $H^*(BSO(n);Z)$?
Feb 28, 2011
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17
Where can I find resources for creating a mathematics “bridge course”?
5
Text book for sheaf theory
5
How to use text within math as a macro without it being subject to \emph