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Positive half of the Witt algebra acts on triply graded link homology
Published 7 May 2013 in math.QA | (1305.1642v1)
Abstract: The positive half of the Witt algebra is the Lie algebra spanned by vector fields x{m+1} d/dx acting as differentiations on the polynomial algebra Q[x] upon which the Soergel bimodule construction of triply graded link homology is based. We show that this action of Witt algebra can be extended to the link homology.
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