On the sl(2) foam cohomology computations

Details On the sl(2) foam cohomology computations On the sl(2) foam cohomology computations

2008-05-30

arxiv.org/abs/0805.4651v1

Journal of Knot Theory and its Ramifications 18, Issue 9 (2009), 1313-1328

Mathematics

Geometric Topology

16 pages, many figures

Scientific paper

10.1142/S0218216509007427

We show how to use Bar-Natan's `divide and conquer' approach to computations
to efficiently compute the universal sl(2) dotted foam cohomology groups, even
for big knots and links. We also describe a purely topological version of the
sl(2) foam theory, in the sense that no dots are needed on foams.

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