f = abstractVarietyMap(Y,X,fUpper,fLower)
Typically it is inconvenient to have to use this function unless absolutely necessary. Consider whether the morphism you need may be built via one of the built-in maps, for example via map(FlagBundle,AbstractVariety,AbstractSheaf).
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This same example can be done much more easily via:
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The object abstractVarietyMap is a method function with options.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/Schubert2.m2:1857:0.