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Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Andrade, J. F. | - |
dc.contributor.author | Simis, A. | - |
dc.creator | Andrade, J. F. | - |
dc.creator | Simis, A. | - |
dc.date.accessioned | 2013-02-05T18:40:30Z | - |
dc.date.available | 2013-02-05T18:40:30Z | - |
dc.date.issued | 1986 | - |
dc.identifier.issn | 0021-8693 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/8369 | - |
dc.description | Texto completo . Acesso restrito. p. 246–259 | pt_BR |
dc.description.abstract | Let & be a n x m matrix with entries in a noetherian ring R and let A’ be the submatrix of JY consisting of the first r columns (r < n - 1). Consider the ideal J,(A) of n x n minors of J! involving the columns of J/Z’. We obtain the primary decomposition and the homological dimension of J,(d) in the generic case. The proofs rely heavily on the methods and the theory of weak d-sequences and straightening laws. As a byproduct we obtain exact conditions under which Jr(d) is generated by a d-sequence and also a complete picture of the blowing-up algebras of J,(d) in that case. The latter proofs rely on recent methods developed by several authors such as those of sliding-depth, approximation complexes, Cohen-Macaulay residual intersections. To close the discussion we construct a free resolution of J,(d) when m=n+ 1 (the case r =n- 1 had been treated before by the present authors). A side curiosity herein obtained is an example of a nonperfect radical 3-generated ideal of codimension 2 whose associated graded ring is a Cohen-Macaulay reduced ring that is not Gorenstein. Examples of this sort do not seem to abound. | pt_BR |
dc.language.iso | en | pt_BR |
dc.publisher | Journal of Algebra | pt_BR |
dc.source | http://dx.doi.org/10.1016/0021-8693(86)90140-7 | pt_BR |
dc.title | On ideals of minors fixing a submatrix | pt_BR |
dc.title.alternative | Journal of Algebra | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.description.localpub | Salvador | pt_BR |
dc.identifier.number | v. 102, n. 1 | pt_BR |
Aparece nas coleções: | Artigo Publicado em Periódico (IME) |
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