fromDual
fromDual f
-- given a 1 by n matrix f
over a polynomial
ring R, computes g so that Hom(R/image g, E)
corresponds to
f, where E is the injective envelope of the coefficient field of R.
This function mimics the script <l_from_dual
of Macaulay, and
is probably going to be changed substantially.
See also toDual.
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