bracket#
The bracket polynomial <.> (aka the Kauffman bracket) is a polynomial invariant of unoriented framed links. It is characterized by the following three rules: 1. <U> = 1, where U is the unknot. 2. <L_X> = A <L_0> + 1/A <L_inf> 3. <L ⊔ U> = (-A^2 - A^-2) <L> See Louis H. Kauffman, State models and the Jones polynomial. Topology 26 (1987), no. 3, 395–407.
Functions
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