Abstract: Aim of this paper a ring R be an associative ring with identity and all modules are unitary and are denotes the matrix rings and Jacobson radical and the singular left ideal of R, also be maximal left ideal of , if is left primitive, is idempotent in then is left primitive.
2020 AMS Subject Classification: 16S10
Keywords: R matrix ring,, finite matrix ring,. be maximal left ideal, Jacobson radical and is left primitive.
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