1. |
Them-ordered real free pro-2-group. Cohomological characterizations* |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2597-2629
Antonio José Engler,
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ISSN:0092-7872
DOI:10.1080/00927879308824696
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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2. |
On finite extensions of hereditary regular rings |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2631-2636
M. Desrochers,
R. Raphael,
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ISSN:0092-7872
DOI:10.1080/00927879308824697
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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3. |
Varieties minimal over representable varieties of lattice-ordered groups |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2637-2665
Michael R. Darnel,
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摘要:
Weinberg showed that the variety of abelian lattice-ordered groups is the minimal nontrivial variety in the lattice of varieties of lattice-ordered groups. Scrimger showed that the abelian variety of lattice-ordered groups has countably infinitely many nonrepresentable covering varieties, and it is now known that his varieties are the only nonrepresentable covers of the abelian variety.
ISSN:0092-7872
DOI:10.1080/00927879308824698
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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4. |
▵-Reductions of modules |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2667-2685
L.J. Ratliff,
D.E. Rush,
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摘要:
Let △ be a multiplicatively closed set of finitely generated nonzero ideals of a ring R. Then the concept of a △ -reduction of anR-submoduleDof anR-moduleAis introduced and several basic properties of such reductions are established. Among these are that a minimal △ -reductionBofDexists and that every minimal basis ofBcan be extended to a minimal basis of allR-submodules betweenBandD, whenRis local andAis a finiteR-module. Then, as an application, △ -reductionsBof a submodule C with property (*) are introduced, characterized, and shown to be quite plentiful. Here, (*) means that (R ,M) is a local ring of altitude at least one, that △ = {Mn;n≥ 0} and that ifD⊆EareR-submodules betweenBandC, then every minimal basis ofDcan be extended to a minimal basis ofE.
ISSN:0092-7872
DOI:10.1080/00927879308824699
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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5. |
On self-duality of ring extensions over quasi-frobenius rings |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2687-2695
Wlofgang Müller,
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ISSN:0092-7872
DOI:10.1080/00927879308824700
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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6. |
On the ideal structure of right distributive rings |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2697-2713
Miguel Ferrero,
Günter Törner,
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ISSN:0092-7872
DOI:10.1080/00927879308824701
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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7. |
Cobalanced torsion-free abelian groups |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2715-2726
H. Pat Goeters,
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ISSN:0092-7872
DOI:10.1080/00927879308824702
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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8. |
On the hochschild cohomology of crossed products |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2727-2748
Katsunori Sanada,
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摘要:
Abstract. In this paper we show that there exists a spectral sequence withapproximatingthe Hochschild cohomology of crossed productsand that an isomorphismpreserves products. As an example, we determine the module structure of the Hochschild cohomology of a certain crossed product and also the ring structure in a special case.
ISSN:0092-7872
DOI:10.1080/00927879308824703
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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9. |
On two extension of dicksons torsion theory |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2749-2769
Jorge Picado,
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摘要:
We establish relations between two extensions of Dickson's torsion theory, one introduced by Barr and the other by Cassidy, Hubert and Kelly. These two notions are studied in a general category and we show that categories with zero object are, in some sense, the ones where the second notion is relevant. In these categories, under suitable completeness conditions, we characterize torsion theories in terms of reflections and connections. A characterization of the torsion-free subcategories which generalizes the one of Dickson is also presented.
ISSN:0092-7872
DOI:10.1080/00927879308824704
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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10. |
The mod 2 cohomology algebras of finite groups with dihedral sylow 2-subgroups |
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Communications in Algebra,
Volume 21,
Issue 8,
1993,
Page 2771-2790
Tsunenobu Asai,
Hiroki Sasaki,
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摘要:
The mod2 cohomology algebras of finite groups with dihedral Sylow 2-subgroups are completely determined, by using the theory of relatively projective covers.
ISSN:0092-7872
DOI:10.1080/00927879308824705
出版商:Gordon and Breach Science Publishers Ltd.
年代:1993
数据来源: Taylor
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