1. |
Non-split extensions over representation-finite hereditary algebras |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1005-1015
Peter Brown,
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摘要:
Letbe the path algebra of a quiver with underlying graph Anor Dn. For all pairs of indecomposable Λ-modulesMandNis computed and a basis consisting of short exact sequences 0 →M→Y→N→ 0 is constructed.
ISSN:0092-7872
DOI:10.1080/00927879808826180
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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2. |
Umt-domains and domains with prüfer integral closure |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1017-1039
Marco Fontana,
Stefania Gabelli,
Evan Houston,
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摘要:
An integral domainRis said to be a UMT-domain if uppers to zero inR[X) are maximalt-ideals. We show thatRis a UMT-domain if and only if its localizations at maximaltdeals have Prüfer integral closure. We also prove that the UMT-property is preserved upon passage to polynomial rings. Finally, we characterize the UMT-property in certian pullback constructions; as an application, we show that a domain has Prüfer integral closure if and only if all its overrings are UMT-domains.
ISSN:0092-7872
DOI:10.1080/00927879808826181
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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3. |
Deformation of YangianY(sl2) |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1041-1055
S.M. Khoroshkin,
A.A. Stolin,
V.N. Tolstoy,
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摘要:
A quantization of a non-standard rational solution of CYBE forsl2is given explicitly. We obtain the quantization with the help of a twisting of the usual YangianY{sl2). This quantum object (deformed YangianYηξ(sl2)) is a two-parametric deformation of the universal enveloping algebraU(sl2[u]) of the polynomial current algebrasl2[u]. We consider the pseudotriangular structure onYηξ(sl2), the quantum doubleDYηξ(sl2), its the universal R-matrix and also the RTT-realization ofYηξ(sl2).
ISSN:0092-7872
DOI:10.1080/00927879808826182
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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4. |
A note on abelian automorphism groups of surfaces of general type |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1057-1067
Jin-Xing Cai,
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摘要:
It is proved that for a complex minimal smooth projective surfaceSof general type, its abelian automorphism group is of order, provided χ(Os) ≥ 315 (resp. the canonical map ofSis composed with a pencil of curves and χ(Os) ≥ 21, whereKsis the canonical divisor ofS, and χ(Os) is the Euler characteristic of the structure sheaf ofS.
ISSN:0092-7872
DOI:10.1080/00927879808826183
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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5. |
Properties of translation numbers in nilpotent groups |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1069-1080
Gregory R. Conner,
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ISSN:0092-7872
DOI:10.1080/00927879808826184
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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6. |
The grothendieck algebra of a hopf algebra, i |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1081-1095
Warren D. Nichols,
M. Bettina Richmond,
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ISSN:0092-7872
DOI:10.1080/00927879808826185
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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7. |
The higher geometric invariants for groups with sufficient commutativity |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1097-1115
Ralf Gehrke,
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摘要:
The higher geometric invariants ∑k(G;Z) and ∑k(G) of [BR] and [Re 1], [Re 2] are examined for groups satisfying certain commutativity relations. The main application computes these invariants for direct products of 1-relator or 3-manifold groups.
ISSN:0092-7872
DOI:10.1080/00927879808826186
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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8. |
Reductions and global dimension of quantized algebras over a regular commutative domain |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1117-1124
Li Huishi,
Van Oystaeyen Freddy,
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ISSN:0092-7872
DOI:10.1080/00927879808826187
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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9. |
Simplicial deirvation, higher bear invariant and homology of crossed modules |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1125-1139
L. Franco,
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摘要:
A Simplicial derivation procedure for crossed module valued functors is established. As a consequence, a theory of higher Baer invariants and relative homology is settle on crossed modules. Then we illustrative how this method is efficient, as it extends classical formulations and results, like various known five term sequences on crossed modules by Conduché and Ellis (1989), the author (1993) and Ladra and R-Grandjeán (1994).
ISSN:0092-7872
DOI:10.1080/00927879808826188
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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10. |
Content and Inverse polynomials on artinian modules |
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Communications in Algebra,
Volume 26,
Issue 4,
1998,
Page 1141-1145
Leif Melkersson,
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摘要:
We investigate when mulitplication by a polynomialf(X) defines a surjective endomorphism on the inverse polynomials moduleM[X-1]. WhenMis artinian or even a module which has a secondary represention, this is equivalent toM=c(f)M, wherec(f), the content off, is the ideal generated by the coefficients inf. A criterion for the surjectivity of the endomorphism on End(L,M) induced by anendomorhismfon a finite free mduleLis also given.
ISSN:0092-7872
DOI:10.1080/00927879808826189
出版商:Gordon and Breach Science Publishers Ltd.
年代:1998
数据来源: Taylor
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