Cocycle class
From Wikipedia, the free encyclopedia
In mathematics, more specifically in cohomology theory, a 
-cocycle 
in the cochain group 
is associated with a unique equivalence class ![[\alpha ]\in H^{q}(X)\,\!](/2014-wikipedia_en_all_02_2014/I/media/c/e/3/8/ce38e73e443b359a1978d1bd58db6612.png)
known as the cocycle class or coclass of 
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