Cyclically Presented Modules, Projective Covers and Factorizations
Cyclically Presented Modules, Projective Covers and Factorizations
We investigate projective covers of cyclically presented modules, characterizing the rings over which every cyclically presented module has a projective cover as the rings R that are Von Neumann regular modulo their Jacobson radical J(R) and in which idempotents can be lifted modulo J(R).Cyclically presented modules naturally appear in the …