b = isSameMap(f1, f2)
phi == psi
b = isSameMap(phi, psi)
Checks whether two rational maps between projective varieties are really the same (that is, agree on a dense open set).
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The Cremona transformation is not the identity, but its square is.
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The object isSameMap is a method function.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/RationalMaps.m2:2164:0.