Each of the maps of a cochain complex
is known as a coboundary operator.
Each of the maps of a cochain complex
is known as a coboundary operator.
This entry contributed by Margherita Barile
Barile, Margherita. "Coboundary Operator." From MathWorld--A Wolfram Web Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/CoboundaryOperator.html