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Additional
Fitting lemma
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Fitting lemma
The
Fitting lemma
, named after the mathematician
Hans Fitting
, is a basic statement in
abstract algebra
. Suppose
M
is a
module
over some
ring
. If
M
is
indecomposable
and has finite
length
, then every
endomorphism
of
M
is either
bijective
or
nilpotent
.
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