Jacquet module

In mathematics, the Jacquet module J(V) of a linear representation V of a group N is the space of co-invariants of N; or in other words the largest quotient of V on which N acts trivially, or the zeroth homology group H0(N,V). The Jacquet functor J is the functor taking V to its Jacquet module J(V). Use of the phrase `Jacquet module` often impli.....
Found on http://en.wikipedia.org/wiki/Jacquet_module
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