منابع مشابه
$n$-cocoherent rings, $n$-cosemihereditary rings and $n$-V-rings
Let $R$ be a ring, and let $n, d$ be non-negative integers. A right $R$-module $M$ is called $(n, d)$-projective if $Ext^{d+1}_R(M, A)=0$ for every $n$-copresented right $R$-module $A$. $R$ is called right $n$-cocoherent if every $n$-copresented right $R$-module is $(n+1)$-coprese-nted, it is called a right co-$(n,d)$-ring if every right $R$-module is $(n, d)$-projective. $R$...
متن کاملof the Manifold Atlas ( 2012 ) 1 – 17 Aspherical manifolds *
This is a survey on known results and open problems about closed aspherical manifolds, i.e., connected closed manifolds whose universal coverings are contractible. Many examples come from certain kinds of non-positive curvature conditions. The property aspherical, which is a purely homotopy theoretical condition, has many striking implications about the geometry and analysis of the manifold or ...
متن کاملRev Esp Quimioter 2012:25(2):122-128
Introduction: Proteus mirabilis is an important pathogen isolated from both community-acquired and health-care associated infections. Acquired AmpC-type beta-lactamases represent an important mechanism of resistance to extended-spectrum cephalosporins and are emerging in several European countries. The objective of this work was to know the prevalence of acquired AmpC beta-lactamase producing P...
متن کاملRsme - Smm - 2012 17 - 20
PROGRAMA mié18 18:00-18:35 →FELIU SAGOLS, CINVESTAVIPN Sobre la reducibilidad delta-ye. mié18 18:35-19:10 →CAMINO BALBUENA, U. Politècnica Catalunya Partial linear spaces and identifyng codes. mié18 19:20-19:55 →DAVID ROMERO, UNAM-Cuernavaca El problema de asignación con dominancia. mié18 19:55-20:30 →JOSÉ CÁCERES, U. Almería Supergeodeticidad en grafos. jue19 11:30-12:05 →FRANCISCO SANTOS, U. ...
متن کاملDocumenta Mathematica Band 17 , 2012
We derive a combinatorial formula for quantized Donaldson-Thomas invariants of the m-loop quiver. Our main tools are the combinatorics of noncommutative Hilbert schemes and a degenerate version of the Cohomological Hall algebra of this quiver. 2010 Mathematics Subject Classification: Primary 16G20, secondary 05E05, 14N35
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ژورنال
عنوان ژورنال: Encontros Bibli: revista eletrônica de biblioteconomia e ciência da informação
سال: 2012
ISSN: 1518-2924
DOI: 10.5007/26002