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3 votes

Links defined by link-severance tableau

If I'm reading your notation correctly, the symbol $\{l_1, l_2\}$ means the two element link with components labelled $l_1, l_2$ together with the additional information that they are unlinked? Simil …
Ryan Budney's user avatar
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Numerical computation of the second Vassiliev invariant, and the permutation $(1 3 4 2)$

This is not a full answer to your question, but it gives some information. The expression (1) is an integral version of the Polyak-Viro formula for the type-2 invariant, described here: https://academ …
Ryan Budney's user avatar
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