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. $R$...
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Bangladesh, an alluvial and deltaic land of 147,570 square km, is prone to various natural disasters such as cyclones, floods, and droughts (Ahmad et al., 2001). The total population is about 130 million. The people of this country are still overburdened with various infectious diseases and ailments due to malnutrition. Unfortunately one more environmental hazard from geological sources – arsen...
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Intramolecular and Lattice Dynamics in V 6−nV V nO7(OCH3)12 Crystal Yu.V. Yablokova,∗, M.A. Augustyniak-Jabà lokow, S. Borshch, C. Daniel and H. Hartl Institute of Molecular Physics, Polish Academy of Sciences Smoluchowskiego 17, 60-179 Poznań, Poland Laboratoire de Chimie, UMR 5181 CNRS-ENS de Lyon 69364 Lyon Cedex 07, France Institut für Chemie, Freie Universität Berlin Fabeckstr. 34-36, 1419...
متن کامل$n$-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. $r$ ...
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The paper assesses the marginal welfare and equity impacts of three transport instruments in the presence of three transport externalities: congestion, air pollution and accidents. It considers a second-best economy in which the government has to use distortionary taxes for revenue-raising and distributional purposes. The assessment uses an applied general equilibrium model for Belgium. The tra...
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ژورنال
عنوان ژورنال: HORIZONTE
سال: 2009
ISSN: 2175-5841,1679-9615
DOI: 10.5752/415