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MultiprojectiveVarieties :: multirationalMap(MultiprojectiveVariety)

multirationalMap(MultiprojectiveVariety) -- identity map

Synopsis

Description

i1 : X = PP_QQ^{2,3,1};

o1 : ProjectiveVariety, PP^2 x PP^3 x PP^1
i2 : 1_X;

o2 : MultirationalMap (automorphism of X)

The command 0_X returns instead the empty subscheme of X.

i3 : 0_X;

o3 : ProjectiveVariety, empty subscheme of PP^2 x PP^3 x PP^1

See also