Definition:Short Exact Sequence of Modules

Definition
A short exact sequence is an exact sequence of the form:


 * $\ds 0 \longrightarrow M_2 \stackrel {d_2} {\longrightarrow} M_3 \stackrel {d_3} {\longrightarrow} M_4 \longrightarrow 0$

Also see

 * Definition:Long Exact Sequence of Modules