Results 41 to 50 of about 18,006 (157)

Semantics of nouns and nominal number [PDF]

, 2010
In the present paper, I will discuss the semantic structure of nouns and nominal number markers. In particular, I will discuss the question if it is possible to account for the syntactic and semantic formation of nominals in a parallel way, that is I ...
Wiese, Heike
core  

Shell Crossing Singularities in Quasi-Spherical Szekeres Models

, 2007
We investigate the occurrence of shell crossing singularities in quasi-spherical Szekeres dust models with or without a cosmological constant. We study the conditions for shell crossing singularity both from physical and geometrical point of view and ...
A. Papapetrou, C. Hellaby, C. J. S. Clarke, D. J. R. Swatton, H. J. Seifert, K. Lake, S. Chakraborty, S. Chakraborty, U. Debnath, U. Debnath   +9 more
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Classification of N=2 supersymmetric CFT_{4}s: Indefinite Series

, 2003
Using geometric engineering method of 4D $\mathcal{N}=2$ quiver gauge theories and results on the classification of Kac-Moody (KM) algebras, we show on explicit examples that there exist three sectors of $\mathcal{N}=2$ infrared CFT$_{4}$s.
A Belhaj, Ait Ben Haddou M Belhaj A Saidi E H, Belhaj A, Belhaj A, Berkovits N, E H Saidi, Kac V G, Katz S, M Ait Ben Haddou, Maldacena J M, Maldacena J M, Sahraoui E M Saidi E H, West P, Zhe-Xian W   +13 more
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Periodic solutions to second-order indefinite singular equations

Journal of Differential Equations, 2017
The authors prove the existence of a periodic solution to a scalar second order differential equation of the type \[ u''=h(t)g(u), \] where \(g\in C^1({\mathbb R}_+;{\mathbb R}_+)\) is a nondecreasing function with a singularity at zero, satisfying \[ \int_0^1g(s)\,ds=+\infty, \] and \(h\in L^1_{\text{loc}}({\mathbb R})\) is a sign-changing \(T ...
Robert Hakl, Manuel Zamora
openaire   +2 more sources

Continuations of Hermitian indefinite functions and corresponding canonical systems : an example [PDF]

, 2004
M. G. Krein established a close connection between the continuation problem of positive definite functions from a finite interval to the real axis and the inverse spectral problem for differential operators.
Langer, Heinz, Langer, Matthias, Sasvári, Zoltán   +2 more
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Hyperbolic Kac-Moody Algebras and Chaos in Kaluza-Klein Models

, 2001
Some time ago, it was found that the never-ending oscillatory chaotic behaviour discovered by Belinsky, Khalatnikov and Lifshitz (BKL) for the generic solution of the vacuum Einstein equations in the vicinity of a spacelike ("cosmological") singularity ...
Andersson, Belinskii, Belinskii, Belinskii, Belinskii, Belinskii, Berger, Bergshoeff, Bernard Julia, Chamseddine, Chamseddine, Chapline, Cremmer, Cremmer, Damour, Damour, Damour, Demaret, Demaret, Demaret, Elskens, Feingold, Hermann Nicolai, Ivashchuk, Julia, Kac, Kirillov, Lifshitz, Marc Henneaux, Misner, Misner, Mizoguchi, Moody, Nicolai, Piatetsky-Shapiro, Rendall, Ryan, Saçlioğlu, Schröder, Thibault Damour, Vinberg   +40 more
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Generic fibrations around multiple fibers

, 2014
Given some type of fibration on a 4-manifold $X$ with a torus regular fiber $T$, we may produce a new 4-manifold $X_T$ by performing torus surgery on $T$.
Larson, Kyle
core  

Singularities of discrete indefinite affine minimal surfaces

Differential Geometry and its Applications
A smooth affine minimal surface with indefinite metric can be obtained from a pair of smooth non-intersecting spatial curves by Lelieuvre's formulas. These surfaces may present singularities, which are generically cuspidal edges and swallowtails. By discretizing the initial curves, one can obtain by the discrete Lelieuvre's formulas a discrete affine ...
openaire   +2 more sources

Simplified broken Lefschetz fibrations and trisections of 4-manifolds

, 2017
Shapes of four dimensional spaces can be studied effectively via maps to standard surfaces. We explain, and illustrate by quintessential examples, how to simplify such generic maps on 4-manifolds topologically, in order to derive simple decompositions ...
Baykur, R. Inanc, Saeki, Osamu
core  

False constraints. A toy model for studying dynamical systems with degenerate Hessian form

, 2010
This paper studies various aspects of the motion of relativistic rotators, both in the presence and absence of external fields, using a toy model which, in a sense, can be regarded as a non-relativistic limit of the rotators.
Arnold V I, Bratek Ł, Bratek Ł, Bratek Ł, Bratek Ł, Courant R, Kassandrov V, Staruszkiewicz A, Łukasz Bratek   +8 more
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