(also nonabelian homological algebra)
A chain complex $A_\bullet$ is called
bounded above if there exists $n \in \mathbb{Z}$ such that $A_k = 0$ for all $k \gt n$;
bounded below if there exists $n \in \mathbb{Z}$ such that $A_k = 0$ for all $k \lt n$;
bounded if it is both bounded above and bounded below.
Last revised on January 15, 2015 at 07:13:06. See the history of this page for a list of all contributions to it.