euler X
euler(X,Verify=>b)
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