Expediente RFO - v. 23 n. 3 (2018)

$n$-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. ‎$R$...

v 3 9 N ov 1 99 3 CTP # 2243

The quantization of a massless conformally coupled scalar field on the 2+1 dimensional Anti de Sitter black hole background is presented. The Green’s function is calculated, using the fact that the black hole is Anti de Sitter space with points identified, and taking into account the fact that the black hole spacetime is not globally hyperbolic. It is shown that the Green’s function calculated ...

Network Working Group Rfo #647

$n$-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. ‎$r$ ...

Intramolecular and Lattice Dynamics in V IV 6 − n V V n O 7 ( OCH 3 ) 12 Crystal

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...