Difference between revisions of "Exact sequence"
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Latest revision as of 23:32, 18 May 2009
An exact sequence is a sequence
![\[A_0 \stackrel{\lambda_1}{\to} A_1 \stackrel{\lambda_2}{\to} A_2 \stackrel{\lambda_3}{\to} \dotsc \stackrel{\lambda_n}{\to} A_n\]](http://latex.artofproblemsolving.com/9/5/a/95a5a7932db3574e02d9945706ec1ca2149c20e6.png)
of homomorphisms between groups with operators
such that the image of 
is the kernel of 
.
This notion appears most often when the are modules.
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