Notes for AKT-090917-1/0:11:19

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Let denote the space of oriented knots in an oriented and be any abelian group. Then, given any invariant , we can extend to -singular knots (i.e. knots with one double point) by setting:

Failed to parse (unknown function "\doublepoint"): {\displaystyle V^{(1)}(\doublepoint)=V(\overcrossing) - V(\undercrossing)}