Virtual push-forwards

Push-forwards in oriented cohomology theories of algebraic varieties: II

This preprint contains proofs of the results anounced in [PS] in the part concerning the construction of push-forwards for an oriented cohomology theory. It is constructed one-to-one correspondences between orientations, Chern structures, Thom structures and integrations on a given ring cohomology theory. The theory is illustrated by motivic cohomology, algebraic K-theory, algebraic cobordism t...

Projective Push-forwards in the Witt Theory of Algebraic Varieties

We define push-forwards along projective morphisms in the Witt theory of smooth quasi-projective varieties over a field. We prove that they have standard properties such as functoriality, compatibility with pull-backs and projection formulas.

Push - forwards in oriented cohomology theories of algebraic varieties : III

This preprint contains proofs of the results anounced in PS] in the part concerning the construction of push-forwards for an oriented cohomology theory. One-to-one correspondences are constructed between orientations, Chern structures, Thom structures and integrations on a given ring cohomology theory. The theory is illustrated by motivic cohomology, algebraic K-theory, algebraic cobordism theo...

Living forwards, understanding backwards.

"Forwards and Backwards" Encryption

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