Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 1966

Homotopy theory, homological algebra, algebraic treatments of manifolds.

6 votes

What (if anything) happened to Intersection Homology?

There do seem to be people thinking about it. I heard Sylvain Cappell lecture a few weeks ago; he spoke about using intersection (co)homology as part of a generalization of characteristic classes to s …
Steven Frankel's user avatar
5 votes

Visualizing how Cech cohomology detects holes

This is explained in "Principles of Algebraic Geometry," by Griffiths & Harris, p42. Given a simplicial decomposition of your space, associate each vertex $v_\alpha$ with its star $U_\alpha$, where th …
Steven Frankel's user avatar