Takes an ideal I as input, dualizes the ideal, and maps it back into the ring, producing Hom_R(I,R) ~ J < R. Used to produce the global sections H^0(mD), where D is an integral divisor defined by I.
The object dualToIdeal is a method function.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/SectionRing.m2:395:0.