"Poincar\u00E9 dual" . "Poincar\u00E9 Duality isomorphism" . . . "Poincar\u00E8 duality" . . . "Poincar\u00E9 duals" . . "Poincar\u00E9 duality" . "quadratic form formulation of Poincar\u00E9 duality" . . "Poincare duality" . . "dual ''1''-skeleton" . . . . "Poincar\u00E9 duality" . . . . . . . . "Poincar\u00E9 symmetry" . "Poincar\u00E9 duality#torsion linking form" . . "Poincar\u00E9 duality theorem" . . "intersection form" . "dual" . .