A characterization of gr-simple rings is given by using the notion of componentwise-dense subrings of a full matrix ring over a division ring. As a consequence, any G-graded full matrix ring over a division ring is is...A characterization of gr-simple rings is given by using the notion of componentwise-dense subrings of a full matrix ring over a division ring. As a consequence, any G-graded full matrix ring over a division ring is isomorphic to a dense subring of a full matrix ring with a good G-grading. Some conditions for a grading of a full matrix ring to be isomorphic to a good one are given, which generalize some results in: Dascascu, S., Lon, B., Nastasescu, C. and Montes, J. R., Group gradings on full matrix rings, J. Algebra, 220(1999), 709-728.展开更多
文摘A characterization of gr-simple rings is given by using the notion of componentwise-dense subrings of a full matrix ring over a division ring. As a consequence, any G-graded full matrix ring over a division ring is isomorphic to a dense subring of a full matrix ring with a good G-grading. Some conditions for a grading of a full matrix ring to be isomorphic to a good one are given, which generalize some results in: Dascascu, S., Lon, B., Nastasescu, C. and Montes, J. R., Group gradings on full matrix rings, J. Algebra, 220(1999), 709-728.
基金Supported by National Natural Science Foundation of China(11126121)Doctor Foundation of Henan Polytechnic University(B2010-93)+2 种基金Natural Science Research Program of Science and Technology Department of Henan Province(112300410120)Natural Science Research Program of Education Department of Henan Province(2011B110016)Applied Mathematics Provincial-level Key Discipline of Henan Province
基金Supported by the project of Jilin Science and Technology Department(No.YDZJ202201-ZYTS622)the project of Jilin Education Department(No.JJKH20220422KJ)。
