isSubset(X,Y)
i1 : Y = PP_(ZZ/33331)^(2,2); o1 : ProjectiveVariety, surface in PP^5
i2 : X = point Y; o2 : ProjectiveVariety, a point in PP^5
i3 : isSubset(X,Y) o3 = true
i4 : isSubset(Y,X) o4 = false