Cup and cap products in intersection (co)homology
arXiv:1106.4799
Abstract
We construct cup and cap products in intersection (co)homology with field coefficients. The existence of the cap product allows us to give a new proof of Poincare duality in intersection (co)homology which is similar in spirit to the usual proof for ordinary (co)homology of manifolds.
arXiv comment49 pages; some revisions; to appear in Advances in Mathematics