ApCoCoA-1:BB.ASneighbors

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borderbasis.ASneighbors

Compute list of across-the-street neighbors in the border of OO

Syntax

$borderbasis.ASneighbors(OO:LIST):LIST

Description

Computes the list of across-the-street neighbors in the border of OO. The input is a list of terms OO (2nd element of type POLY). The output is a list of quadruples [i,j,k,l] s.t. x_k * b_i = x_l * b_j.