CanonicalDualBasisAS

Let $A_0, A_1,\cdots,A_d$ be adjacency matrices of an association scheme R. CanonicalDualBasisAS(R) returns the dual basis $[[A_0,A_1,\cdots,A_d], [{n_0}^{-1}A_{0^*},{n_1}^{-1}A_{1^*},\cdots,{n_d}^{-1}A_{d^*}]]$.