منابع مشابه
Towards large r from [ p , q ] - inflation
The recent discovery of B-mode polarizations in the CMB by the BICEP2 collaboration motivates the study of large-field inflation models which can naturally lead to significant tensor-to-scalar ratios. A class of such models in string theory are axion monodromy models, where the shift symmetry of an axion is broken by some branes. In type IIB string theory such models so far utilized NS5 branes ...
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An $(n, r)$-arc is a set of $n$ points of a projective plane such that some $r$, but no $r+1$ of them, are collinear. The maximum size of an $(n, r)$-arc in $PG(2, q)$ is denoted by $m_r(2,q)$. In this paper we present a new $(184,12)$-arc in PG$(2,17),$ a new $(244,14)$-arc and a new $(267,15$)-arc in $PG(2,19).$
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We give a criterion to check if, given a prime power pr with r > 1, the only rational points of the modular curve X 0 (p r) are trivial (i.e. cusps or points furnished by complex multiplication). We then prove that this criterion is verified if p satisfies explicit congruences. This applies in particular to the modular curves Xsplit(p), which intervene in the problem of Serre concerning uniform...
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We have found the solution to the back reaction of putting a stack of coincident D3 and D5 branes in R×M6, where M6 is constructed from an infinite class of Sasaki-Einstein spaces, L. The non-zero fluxes associated to 2 and 3-form suggests the presence of non-contractible 2 and 3-cycles in this geometry. The radial part of the warp factor has the usual form and possess the cascading feature. We...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2014
ISSN: 1029-8479
DOI: 10.1007/jhep04(2014)155