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Khovanov's conjecture over Z[c]

Magnus Jacobsson

math.GTarXiv:math/0308151

Abstract

We disprove the conjecture of M. Khovanov (math.QA/9908171) on the functoriality of his link homology with polynomial coefficients. This is in contrast to the case of integer coefficients, where functoriality was proved in math.GT/0206303 .

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