The free -ring is a graded -ring.
Warren, Roger D. (1993)
International Journal of Mathematics and Mathematical Sciences
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Warren, Roger D. (1993)
International Journal of Mathematics and Mathematical Sciences
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Paul M. Cohn (1966)
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Pham Ngoc Ánh, László Márki (1994)
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Dobbs, David E., Kiltinen, John O., Orndorff, Bobby J. (1992)
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Kwak, Tai Keun (2006)
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Newman, M.F., Vaughan-Lee, Michael (1998)
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Zhanmin Zhu (2017)
Commentationes Mathematicae Universitatis Carolinae
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We give some new characterizations of quasi-Frobenius rings by the generalized injectivity of rings. Some characterizations give affirmative answers to some open questions about quasi-Frobenius rings; and some characterizations improve some results on quasi-Frobenius rings.
O. D. Artemovych (1999)
Commentationes Mathematicae Universitatis Carolinae
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We characterize left Noetherian rings which have only trivial derivations.