Intersection numbers, transfers, and group actions

摘要: Abstract We introduce a new definition of intersection number by means umkehr maps. This agrees with an obvious up to sign. It allows us extend the concept parametrically fibre bundles. For bundles we can then define transfers. Fibre arise naturally in equivariant situations, so trace action divides numbers. apply this projective varieties and other examples. Also study actions nonconnected groups their traces.