منابع مشابه
ar X iv : 0 90 6 . 42 14 v 1 [ he p - ex ] 2 3 Ju n 20 09
The cross sections for the reactions ee → φη, φη, ρη, ρη have been measured using a data sample of 516 fb collected with the Belle detector at the KEKB asymmetric-energy ee collider. The corresponding values of the cross sections are: 1.4± 0.4± 0.1 fb (φη), 5.3± 1.1± 0.4 fb (φη), 3.1± 0.5± 0.1 fb (ρη) and 3.3± 0.6± 0.2 fb (ρη). The energy dependence of the cross sections is presented using Bell...
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. $R$...
متن کاملar X iv : 1 20 1 . 39 42 v 1 [ as tr o - ph . C O ] 1 8 Ja n 20 12 Dark Matter
From astronomical observations, we know that dark matter exists, makes up 23% of the mass budget of the Universe, clusters strongly to form the load-bearing frame of structure for galaxy formation, and hardly interacts with ordinary matter except gravitationally. However, this information is not enough to identify the particle specie(s) that make up dark matter. As such, the problem of determin...
متن کامل42 v 1 1 1 Fe b 20 00 Are Simple Real Pole Solutions Physical ?
We consider exact solutions generated by the inverse scattering technique , also known as the soliton transformation. In particular, we study the class of simple real pole solutions. For quite some time, those solutions have been considered interesting as models of cosmological shock waves. A coordinate singularity on the wave fronts was removed by a transformation which induces a null fluid wi...
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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ژورنال
عنوان ژورنال: Encontros Bibli: revista eletrônica de biblioteconomia e ciência da informação
سال: 2015
ISSN: 1518-2924
DOI: 10.5007/38083