Abstract

We present an algorithm which converts a given Sagbi basis of a polynomial K-subalgebra A with respect to one monomial ordering to the Sagbi basis of A with respect to another monomial ordering, under the assumption that the subalgebra A admits a finite Sagbi basis with respect to all monomial orderings. The Sagbi walk method converts a Sagbi basis by partitioning the computations following a path in the Sagbi fan.

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