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normalSheaf -- normal sheaf

Synopsis

Description

i1 : X = PP_(ZZ/65521)^(2,2);

o1 : ProjectiveVariety, surface in PP^5
i2 : Y = random(2,X);

o2 : ProjectiveVariety, hypersurface in PP^5
i3 : N = normalSheaf X;

o3 : Coherent sheaf on X
i4 : N' = normalSheaf(X,Y);

o4 : Coherent sheaf on X
i5 : rank HH^0 N

o5 = 27
i6 : rank HH^0 N'

o6 = 12

Ways to use normalSheaf:

For the programmer

The object normalSheaf is a method function.