| 1. |
Algebras stably equivalent to the trivial extensions of hereditary and tubular algebras |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 989-997
Zygmunt Pogorzaly,
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ISSN:0092-7872
DOI:10.1080/00927879908826475
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 2. |
Classical quotient rings of incidence algebras |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 999-1012
Eugene Spiegel,
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ISSN:0092-7872
DOI:10.1080/00927879908826476
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 3. |
Finite groups can be arbitrarily hamiltonian |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1013-1016
Stephen T. Ahearn,
Mark L. Huber,
Gary J. Sherman,
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摘要:
Letrbe a rational in (0,1]. There exists a finite groupGfor which the proportion of elementsgand subgroupsHsatisfyinggHg-1=Hisr. An analogous result holds for three other measures of ‘Hamiltonianness’.
ISSN:0092-7872
DOI:10.1080/00927879908826477
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 4. |
On local-extensions of algebras |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1017-1031
I.R. Martins,
J.A. De La Peña,
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ISSN:0092-7872
DOI:10.1080/00927879908826478
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 5. |
Almost irreducible tensor squares |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1033-1051
Gunter Malle,
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摘要:
LetGbe a covering group of a finite almost simple group. We determine those faithful irreducible complex charactersxofGfor whichx⊗x*- 1 is again irreducible. This gives a classification of the quasi-simple absolutely irreducible subgroups ofGLn(q) of order prime toqwhich act irreducibly on the Lie algebra of typeAn-1 via the adjoint representation. The proof uses Lusztig’s description of the degrees of irreducible characters of reductive groups and the determination of Brauer trees by Fong and Srinivasan to handle the case of groups of Lie type. It turns out that the only infinite series of examples are characters of Weyl representations for SUn(Fn) and Sp2n(F3).
ISSN:0092-7872
DOI:10.1080/00927879908826479
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 6. |
A character theoretic condition characterizing nilpotent groups |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1053-1056
Stephen M. Gagola,
Mark L. Lewis,
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ISSN:0092-7872
DOI:10.1080/00927879908826480
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 7. |
Howson property and one-relator groups1 |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1057-1072
Ilya Kapovich,
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摘要:
We provide an example of a torsion-free word hyperbolic one-relator groupGwhich does not have the Howson property (the finitely generated intersection property). Moreover, this groupGcontains a free subgroup of rank two that is not quasiconvex inG. The groupGalso turns out to be not subgroup separable. Similarities and differences with 3-manifold groups are discussed.
ISSN:0092-7872
DOI:10.1080/00927879908826481
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 8. |
Golod pair and golod invariant |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1073-1090
Kisuk Lee,
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ISSN:0092-7872
DOI:10.1080/00927879908826482
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 9. |
On n-presented modules and almost excellent extensions* |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1091-1102
Weimin Xue,
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ISSN:0092-7872
DOI:10.1080/00927879908826483
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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| 10. |
Cohen-macaulay approximations from the viewpoint of triangulated categories*. |
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Communications in Algebra,
Volume 27,
Issue 3,
1999,
Page 1103-1126
Kiriko Kato,
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摘要:
We introduce the notion of origin extension which is a formal analogue of Cohen-Macaulay approximation. However, as an approximation, origin extensions are not completely analogous to Cohen-Macaulay approximations. The most remarkably, there exist nonminimal origin extensions that do not include the minimal one as a direct summand. We also discuss when these nontrivially nonminimal origin extensions exist. Our aim is to find a standard method of classifying modules via Cohen-Macaulay approximations. When a moduleMhas positive grade, we show no other module has the same Cohen-Macaulay approximation asM.
ISSN:0092-7872
DOI:10.1080/00927879908826484
出版商:Gordon and Breach Science Publishers Ltd.
年代:1999
数据来源: Taylor
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