polynomialExt M, polynomialExt I; rationalFunctionExt(i,M), rationalFunctionExt(i,I)
The algorithm used appears in the paper 'Polynomial and rational solutions of holonomic systems' by Oaku-Takayama-Tsai (2000). The method is to combine isomorphisms of Bjork and Kashiwara with the restriction algorithm.
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The object polynomialExt is a method function with options.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/BernsteinSato/DOC/DHom.m2:182:0.