Linking Wu classes

The linking Wu classes are the S-acyclic counterparts of the algebraic Wu classes of Sl-  

Let C be an S-acyclic finite-dimensional A-module chain E-svmmetr ic 

Motivation the cohomology classes xen CC) of an 8-acycllc A-module chain complex C are in a natural one-one corresponder with the chain homotopy classes of A-module chain maps X C ----------------------------- C j(A,S),  

By analogy with Proposition 1.4.1 we have Proposition 3,3.1 i) The linking Wu classes are related to each other by 

As a first application of the linking Wu classes we have the following S-acyclic analogues of Proposit ion 1.2.2 i) Proposition 3.3.2 i) If A,S,e ate such that 

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