Theorem detail

Alias: Evans' Cancellation Theorem

Statement: Let $M$ be a right $R$ module. If the endomorphism ring of $M_R$ has stable range $1$, then $M$ is cancellable from direct sums in $Mod-R$.

Link: http://msp.org/pjm/1973/46-1/pjm-v46-n1-p08-p.pdf

Reference(s)

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