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MultiprojectiveVarieties :: singularLocus(MultiprojectiveVariety)

singularLocus(MultiprojectiveVariety) -- the singular locus of the variety

Synopsis

Description

i1 : X = projectiveVariety ideal random({2,1},ZZ/101[x_0,x_1,x_2,y_0,y_1,Degrees=>{3:{1,0},2:{0,1}}]);

o1 : ProjectiveVariety, surface in PP^2 x PP^1
i2 : singularLocus X;

o2 : ProjectiveVariety, empty subscheme of PP^2 x PP^1
i3 : Y = X + projectiveVariety (ideal random({1,1},ring ambient X));

o3 : ProjectiveVariety, surface in PP^2 x PP^1
i4 : singularLocus Y;

o4 : ProjectiveVariety, curve in PP^2 x PP^1