In a chain complex of modules
the module  of 
-cycles is the kernel of 
, which is a submodule of 
.
 
	    
	
    
This entry contributed by Margherita Barile
Barile, Margherita. "Homology Cycle." From MathWorld--A Wolfram Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/HomologyCycle.html