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arxiv: 1302.2985 · v2 · pith:AJTHNZ7Onew · submitted 2013-02-13 · 🧮 math.GT · math.QA

Foams and sl(n) cohomology for tangles (n > 3)

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keywords cohomologyfoamstanglescalledcharacteristiccobordismsconstructdoubly-graded
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We use 4-valent planar graphs and singular cobordisms (called foams) to construct an integral doubly-graded cohomology for tangles, and in particular for links, whose graded Euler characteristic yields the sl(n) link polynomial (for n > 3).

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