In a cochain complex of modules
 |
the module 
of 
-cocycles 
is the kernel of 
, which is a submodule of 
.
Cocycle
See also
Coboundary, Cohomology, Homology CycleThis entry contributed by Margherita Barile
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Cite this as:
Barile, Margherita. "Cocycle." From MathWorld--A Wolfram Web Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/Cocycle.html