User sani - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-22T18:31:26Z http://mathoverflow.net/feeds/user/18912 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/80830/ring-of-cohomology-de-rham-grassmannian ring of cohomology De Rham grassmannian sani 2011-11-13T17:14:03Z 2011-11-13T18:00:24Z <p>For grassmannian manifold G_2(R^{2^{r}+2}), how can i show H^{2}(G_2(R^{2^{r}+2}))=Z_2+Z_2 ? in ring of cohomology Whit coefficients Z_2!</p> http://mathoverflow.net/questions/80527/poincare-duality Poincare duality sani 2011-11-09T22:29:54Z 2011-11-09T22:36:43Z <p>How is following map isomorphism by Poincare duality?</p> <p>H^{p-1}(M)--------> H^{p}(M) by cup product whit w_1 in H^{1}(M). please help me!</p> http://mathoverflow.net/questions/79727/complex-grassmanian-manifold complex grassmanian manifold sani 2011-11-01T16:57:11Z 2011-11-01T16:57:11Z <p>Is the realification of tangent bundle over complex grassmannian manifold Gr(C^n) isomorphism with Gr(C^n)?</p> http://mathoverflow.net/questions/79639/complex-grassmanian-manifold complex grassmanian manifold sani 2011-10-31T15:28:45Z 2011-10-31T15:28:45Z <p>C^n to R^2n is isomorphism.then ,Is Gr(C^n) to Gr(R^2n) isomorphism? Gr(C^n) and Gr(R^2n) are grassmannian manifold.</p> http://mathoverflow.net/questions/79607/complex-grassmanian-manifold complex grassmanian manifold sani 2011-10-31T10:13:51Z 2011-10-31T10:13:51Z <p>Is Gr(C^n) and Gr(R^2n) isomorphism ?</p>