The Jones polynomial and the planar algebra of alternating links

Details The Jones polynomial and the planar algebra of alternating links The Jones polynomial and the planar algebra of alternating links

2008-07-16

arxiv.org/abs/0807.2600v2

Mathematics

Geometric Topology

16 pages, 8 figures

Scientific paper

It is a well known result from Thistlethwaite that the Jones polynomial of a non-split alternating link is alternating. We find the right generalization of this result to the case of non-split alternating tangles. More specifically: the Jones polynomial of tangles is valued in a certain skein module, we describe an alternating condition on elements of this skein module, show that it is satisfied by the Jones invariant of the single crossing tangles, and prove that it is preserved by appropriately "alternating" planar algebra compositions. Hence, this condition is satisfied by the Jones polynomial of all alternating tangles. Finally, in the case of 0-tangles, that is links, our condition is equivalent to simple alternation of the coefficients of the Jones polynomial.

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