Köthe’s upper nil radical for modules

2013 ◽  
Vol 138 (4) ◽  
pp. 295-306 ◽  
Author(s):  
N. J. Groenewald ◽  
D. Ssevviiri
Keyword(s):  
2014 ◽  
Vol 13 (04) ◽  
pp. 1350121 ◽  
Author(s):  
AGATA SMOKTUNOWICZ

It was shown by Bergman that the Jacobson radical of a Z-graded ring is homogeneous. This paper shows that the analogous result holds for nil radicals, namely, that the nil radical of a Z-graded ring is homogeneous. It is obvious that a subring of a nil ring is nil, but generally a subring of a Jacobson radical ring need not be a Jacobson radical ring. In this paper, it is shown that every subring which is generated by homogeneous elements in a graded Jacobson radical ring is always a Jacobson radical ring. It is also observed that a ring whose all subrings are Jacobson radical rings is nil. Some new results on graded-nil rings are also obtained.


2016 ◽  
Vol 150 (2) ◽  
pp. 303-311
Author(s):  
N. J. Groenewald
Keyword(s):  

1965 ◽  
Vol 16 (1) ◽  
pp. 22-24 ◽  
Author(s):  
A. P. J. van der Walt
Keyword(s):  

1993 ◽  
Vol 158 (1) ◽  
pp. 226-232 ◽  
Author(s):  
N. Kamiya
Keyword(s):  

1985 ◽  
Vol 13 (6) ◽  
pp. 1419-1447
Author(s):  
Ng Seong Nam
Keyword(s):  

1992 ◽  
Vol 47 (1) ◽  
pp. 117-120 ◽  
Author(s):  
F.I. Sidky ◽  
S.A. Khatab
Keyword(s):  

1978 ◽  
Vol 17 (3) ◽  
pp. 199-209 ◽  
Author(s):  
A. S. Markovichev
Keyword(s):  

1980 ◽  
Vol 23 (3) ◽  
pp. 317-329 ◽  
Author(s):  
Shalom Feigelstock ◽  
Aaron Klein

Radicals appear in many algebraic contents. For modules over a ring, they give rise to pre-torsion and torsion theories, Goldman (5), Lambek (14). In the category of groups, Kurosh, Plotkin and others have introduced radicals (6), (13), (21), but unlike the radicals in module theory these radicals are not necessarily functorial, as for example the nil radical and the Hirsch-Plotkin radical (6). The functorial method in module theory has been extended to abelian categories, Dickson (2), to the category of nilpotent groups, Hilton (8), Warfield (25), and to the category of groups, Plotkin (22), and to general categories, Wiegandt (26), Holcombe and Walker (10).


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