diagRevLexInit w
diagRevLexInit A
Given a partial alternating sign matrix or a permutation in 1-line notation, return the diagonal initial ideal of the corresponding ASM ideal or Schubert determinantal ideal with respect to reverse lexicographic order, where the variables are ordered smallest to largest by reading from rows left-to-right and ordering rows from bottom-to-top (starting in the southwest corner).
This function computes over the coefficient field of rational numbers unless an alternative is specified.
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The object diagRevLexInit is a method function with options.