In mathematics, the Peterson–Stein formula, introduced by , describes the
Spanier–Whitehead dual of a
secondary cohomology operation In mathematics, a secondary cohomology operation is a functorial correspondence between cohomology groups. More precisely, it is a natural transformation from the kernel of some primary cohomology operation to the cokernel of another primary operati ...
.
References
*
Theorems in algebraic topology
{{topology-stub