Results 51 to 60 of about 18,006 (157)

On ADE Quiver Models and F-Theory Compactification

open access: yes, 2005
Based on mirror symmetry, we discuss geometric engineering of N=1 ADE quiver models from F-theory compactifications on elliptic K3 surfaces fibered over certain four-dimensional base spaces.
A Belhaj   +14 more
core   +1 more source

The Roots of Genericity: Indefinite Singulars vs Definite Plurals∗ [PDF]

open access: yes, 2012
Generic readings of indefinites have two salient properties : they are rare, occurring mostly in the subject position, and they always come with a modal or law-like flavor. Another well-known property of singular indefinites is that they are, as a default, bound by existential closure. The paper assumes that generic readings of indefinite emerge if and
openaire   +2 more sources

Non-commutative ADE geometries as holomorphic wave equations

open access: yes, 2005
Borrowing ideas from the relation between classical and quantum mechanics, we study a non-commutative elevation of the ADE geometries involved in building Calabi-Yau manifolds.
Abdellah Sebbar   +19 more
core   +1 more source

Explicit error bound for modified numerical iterated integration by means of Sinc methods

open access: yes, 2015
This paper reinforces numerical iterated integration developed by Muhammad--Mori in the following two points: 1) the approximation formula is modified so that it can achieve a better convergence rate in more general cases, and 2) explicit error bound is ...
Okayama, Tomoaki
core   +1 more source

Nonlinear singular problems with an indefinite perturbation

open access: yesRevista Matemática Complutense
Abstract We consider a nonlinear Dirichlet problem driven by a nonhomogeneous differential operator and with a reaction which exhibits the competing effects of a parametric singular term and of a superlinear perturbation. Using variational methods together with truncation and comparison techniques, we show that for all small values of the ...
Nikolaos S. Papageorgiou   +2 more
openaire   +1 more source

On the cosmological singularity

open access: yes, 2014
The long story of the oscillatory approach to the initial cosmological singularity and its more recent incarnation in multidimensional universe models is told.Comment: The invited paper for Proceedings of the XIII Marcel Grossmann Meeting (Stockholm ...
Belinski, Vladimir A.
core   +1 more source

Elliptic problems with singular nonlinearities of indefinite sign

open access: yesAIMS Mathematics, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

Gravitational Billiards, Dualities and Hidden Symmetries

open access: yes, 2005
The purpose of this article is to highlight the fascinating, but only very incompletely understood relation between Einstein's theory and its generalizations on the one hand, and the theory of indefinite, and in particular hyperbolic, Kac Moody algebras ...
Nicolai, H.
core   +1 more source

Quadrature rule for indefinite integral of algebraic–logarithmic singular integrands

open access: yesJournal of Computational and Applied Mathematics, 2007
The authors present an automatic quadrature method to approximate the indefinite integral of functions involving algebraic-logarithmic singularities. The computation of such integrals is required to solve some integral equations derived from the Schrödinger equation in nuclear physics.
Hasegawa, Takemitsu, Sugiura, Hiroshi
openaire   +2 more sources

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