# extension

A short exact sequence $0\to A\to B\to C\to 0$ is sometimes called an extension of $C$ by $A$. This is also applied to an object $B$ which fits into such an exact sequence.

Title extension Extension 2013-03-22 13:51:10 2013-03-22 13:51:10 bwebste (988) bwebste (988) 4 bwebste (988) Definition msc 20E22