Co-operational bivariant theory

Abstract

For a covariant functor W. Fulton and R. MacPherson defined \emph{an operational bivariant theory} associated to this covariant functor. In this paper we will show that given a contravariant functor one can similarly construct a ``dual" version of an operational bivariant theory, which we call a \emph{co-operational} bivariant theory. If a given contravariant functor is the usual cohomology theory, then our co-operational bivariant group for the identity map consists of what are usually called ``cohomology operations". In this sense, our co-operational bivariant theory consists of \emph{``generalized"} cohomology operations.

Any comments and suggestions are welcome. Some revision was made. Substantial revised version to appear in Mathematics Research Reports

References in corpus (3)

• Bivariant Algebraic Cobordism
• Stable and Unstable operations in Algebraic Cobordism
• Equivariant Grothendieck-Riemann-Roch and localization in operational K-theory