Geodesic
Isomorphisms of graded endomorphism rings of progenerators
Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 1, pp. 3-10
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We prove the analogue of Bolla's theorem that isomorphisms of graded endomorphism rings of progenerators are induced by the graded Morita equivalence. 
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I. N. Balaba. Isomorphisms of graded endomorphism rings of progenerators. Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 1, pp. 3-10. http://geodesic.mathdoc.fr/item/FPM_2007_13_1_a0/

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