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MultiprojectiveVarieties :: euler(MultiprojectiveVariety)

euler(MultiprojectiveVariety) -- topological Euler characteristic of a (smooth) multi-projective variety

Synopsis

Description

i1 : X = PP_QQ^(2,2); -- Veronese surface

o1 : ProjectiveVariety, surface in PP^5
i2 : euler X

o2 = 3
i3 : X4 = X^4;

o3 : ProjectiveVariety, X x X x X x X
i4 : euler X4

o4 = 81

See also