Greg Friedman

activity

20032026

most citedAn elementary illustrated introduction to simplicial sets

42 citations · 69 across the 29 of their papers we have counts for

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Showing 2008Show all

4 papers · 1 filter

math.AT2008★ 42 cited

An elementary illustrated introduction to simplicial sets

Greg Friedman

This is an expository introduction to simplicial sets and simplicial homotopy theory with particular focus on relating the combinatorial aspects of the theory to their geometric/to…

math.GT2008

Intersection homology Kunneth theorems

Greg Friedman

Cohen, Goresky and Ji showed that there is a Kunneth theorem relating the intersection homology groups $I^{p ˉ} H_{*} (X \times Y)$ to $I^{p ˉ} H_{*} (X)$ and $I^{p ˉ} H_{*} (Y)$ , prov…

math.GT2008

On the chain-level intersection pairing for PL pseudomanifolds

Greg Friedman

James McClure recently showed that the domain for the intersection pairing of PL chains on a PL manifold $M$ is a subcomplex of $C_{*} (M) \otimes C_{*} (M)$ that is quasi-isomorphic to $…

math.GT2008

Intersection homology with field coefficients: $K$ -Witt spaces and $K$ -Witt bordism

Greg Friedman

We construct geometric examples of pseudomanifolds that satisfy the Witt condition for intersection homology Poincare duality with respect to certain fields but not others. We also…

An elementary illustrated introduction to simplicial sets

Intersection homology Kunneth theorems

On the chain-level intersection pairing for PL pseudomanifolds

Intersection homology with field coefficients: K-Witt spaces and K-Witt bordism

Intersection homology with field coefficients: $K$ -Witt spaces and $K$ -Witt bordism