May 1991
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11 Reads
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40 Citations
Proceedings of the London Mathematical Society
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May 1991
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11 Reads
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40 Citations
Proceedings of the London Mathematical Society
November 1989
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15 Reads
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125 Citations
Journal of Algebra
August 1989
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19 Reads
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20 Citations
Journal of the London Mathematical Society
August 1989
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14 Reads
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68 Citations
Journal of the London Mathematical Society
January 1989
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1 Read
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1 Citation
Communications in Algebra
December 1988
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6 Reads
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10 Citations
Journal of the London Mathematical Society
October 1988
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36 Reads
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11 Citations
Journal of Pure and Applied Algebra
This paper contains two results which bear upon the zero-divisor conjecture for group rings. The first, proved using commutative algebra, asserts that a finitely generated torsion-free meta- belian-by-finite group has many torsion-free quotients of finite rank. The second result concerns the completion of the group algebra kG at its augmentation ideal when G is a polycyclic pro-p group and k is an algebraically closed field of characteristics p>0. For example, if G is torsion-free it is shown that this completion is a domain. These two results imply that if G is a torsion-free soluble group of derived length at most three, and K is a field of characteristics zero, then KG is a domain.
May 1988
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42 Reads
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248 Citations
Proceedings of the London Mathematical Society
August 1986
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2 Reads
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1 Citation
Journal of the London Mathematical Society
May 1986
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6 Reads
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2 Citations
Proceedings of the London Mathematical Society
... where the orientation of the arrows in (G o (x)) −1 (Q sp 1 ) does not depend on the relation > for words. Following Crawley-Boevey [CrB88], this simplified construction is sufficient to describe the indecomposable representations of the skewed-gentle algebras (a special case of clannish algebras) in our situation, where we consider kQ with char(k) = 2 and defining relations X 2 − 1 for all special loops. ...
December 1988
Journal of the London Mathematical Society
... There is also an extensive literature for the construction of embeddings of groups H into the profinite completions of torsion-free, finitely generated nilpotent and solvable groups. For example, the work [18] shows that if G is a finitely-generated, torsion-free nilpotent group, then the profinite completion G is torsion free, so if D ⊂ G is a closed subgroup, then it must be a Cantor group. ...
Reference:
Molino theory for matchbox manifolds
October 1988
Journal of Pure and Applied Algebra
... Our work also differs from theirs in the methods used. They used geometric models to study gentle algebras and their representations (developed in [ABCJP10], [OPS18], [PPP19], [BS21]), whereas we use combinatorial descriptions of representations and morphisms between them (developed in [GP68], [BR87], [CB89], [Kra91]). ...
November 1989
Journal of Algebra
... (i) Q is the matrix algebra In each one of these cases, it is shown in the proof of [3, (6.8)], using previous work by V. Dlab and M. Ringel [15]& [14], and Crawley-Boevey [10], that there is a bounded principal ideal domain Γ and an exact full and faithful functor Ψ : Γ-Mod−−→Q-Mod mapping indecomposable Γ-modules of finite length onto regular Q-modules. Moreover, Q-reg ∼ = Ψ(Γ-mod) U, where U is a uniserial subcategory of Q-mod generated by a simple regular module. ...
May 1991
Proceedings of the London Mathematical Society
... The purpose of this section is to deduce Theorem B from the results of [6]. We fix an algebraically closed field of characteristic p>O. ...
May 1986
Proceedings of the London Mathematical Society
... Skew-gentle algebras are a special case of clannish algebras [CB89]; however, when working over a field of characteristic different from 2, skew-gentle algebras are conveniently described (up to Morita-equivalence) as skew-group algebras of gentle algebras with an action of a group of order two on their Gabriel quiver. The group action lifts to an action on the graded surface with dissection giving rise to the gentle algebra, and thus to the partially wrapped Fukaya category. ...
August 1989
Journal of the London Mathematical Society
... The trichotomy theorem of Drozd [62] (see also Crawley-Boevey [55]) for finite dimensional algebras states that every finite dimensional algebra is is of finite, tame or wild representation type, and these types are mutually exclusive. Roughly speaking, finite representation type means that there are only finitely many isomorphism classes of finitely generated indecomposable modules. ...
August 1989
Journal of the London Mathematical Society
... The proof of (1.4) relies on the theory of differential tensor algebras (ditalgebras) and reduction functors first developed by the Kiev School of representation theory, see [18] and [16] (see also [11]). For the general background on ditalgebras and their module categories, we refer the reader to [5]. ...
May 1988
Proceedings of the London Mathematical Society