Thank you very much. I test your hint, but it was wrong. Please indicate where i require to correct the following example.
sage: y1=CC(-0.5000,0.8660) > sage: print(y1) > sage: V = CC^9 > sage: v1 = vector(CC, [0,0,0,-y1-1,1,0,0,0,0]) > sage: v2 = vector(CC, [y1,-y1,-1,1,0,y1,1,0,0]) > sage: v3 = vector(CC, [0,y1,-y1,0,0,0,0,0,1]) > sage: v4 = vector(CC, [y1,0,0,0,0,0,0,1,0]) > sage: W = V.span([v1, v2, v3, v4]) > sage: W > sage: U = CC^9 > sage: u1 = vector(CC, [0,0,1,0,0,0,1,0,0]) > sage: u2 = vector(CC, [0,0,0,1,0,1,0,0,0]) > sage: u3 = vector(CC, [1,0,0,0,0,0,0,0,0]) > sage: u4 = vector(CC, [0,0,0,0,0,0,0,0,1]) > sage: u5 = vector(CC, [0,0,0,0,1,0,0,0,0]) > sage: u6 = vector(CC, [0,1,0,0,0,0,0,1,0]) > sage: E = U.span([u1, u2, u3, u4, u5, u6]) > sage: E > sage: H = W.intersection(E) > sage: H oogle.com/d/optout <https://groups.google.com/d/optout>. > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.