UNRAVELING THE INTEGRAL KNOT CONCORDANCE GROUP 15
isometric structures annihilated by T . An important special case will
be when T consists of non-negative powers of a fixed polynomial c p ,
abusing notation, we will denote this case by C„„(R) .
b) Let S be and R-algebra, finitely generated as an R-module.
Then C (R) will denote the concordance classes of isometric structures
which have a compatible S-module structure, that is there is an element
s in S so that sx = t(x) for all x in the underlying module M .
The correct usage of the subscript will always be clear from the context.
We now extend the injection C" (2S)~ * C (Q) to a short exact
sequence in order to further understand the structure of the integral
concordance group.
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