e = doubleDualMap M
provide the natural map M --> Hom(Hom(M,S),S), where S = ring M.
The object doubleDualMap is a method function.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/AnalyzeSheafOnP1.m2:241:0.