Khovanov's conjecture over Z[c]
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coefficientsconjecturefunctorialitykhovanovmathcasecontrastdisprove
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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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