Results 21 to 30 of about 300,939 (289)
Journal of High Energy Physics, 2003 Big bang/crunch curvature singularities in exact CFT string backgrounds can be removed by turning on gauge fields. This is described within a family of {SL(2)xSU(2)xU(1)_x}/{U(1)xU(1)} quotient CFTs. Uncharged incoming wavefunctions from the ``whiskers'' of the extended universe can be fully reflected if and only if a big bang/crunch curvature ...
Elitzur, Shmuel +2 more
openaire +2 more sources
Singularity analysis via the iterated kernel method [PDF]
Discrete Mathematics & Theoretical Computer Science, 2013 We provide exact and asymptotic counting formulas for five singular lattice path models in the quarter plane. Furthermore, we prove that these models have a non D-finite generating function.
Stephen Melczer, Marni Mishna
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Kinematic Comparisons of Hybrid Mechanisms for Bone Surgery: 3-PRP-3-RPS and 3-RPS-3-PRP
Machines, 2022 This paper proposes an approach to derive the Jacobian matrix of a hybrid mechanism by applying a velocity operator to the transformation matrix. This Jacobian matrix is capable of deducing hybrid singularities, which cannot be identified by using the ...
Christopher Reinaldo +3 more
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Nullcone Fronts of Spacelike Framed Curves in Minkowski 3-Space
Mathematics, 2021 The investigation of objects in Minkowski space is of great significance, especially for those objects with mathematical and physical backgrounds. In this paper, we study nullcone fronts, which are formed by the light rays emitted from points on a ...
Pengcheng Li, Donghe Pei
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Classification of phase singularities for complex scalar waves [PDF]
, 2006 Motivated by the importance and universal character of phase singularities which are clarified recently, we study the local structure of equi-phase loci near the dislocation locus of complex valued planar and spatial waves, from the viewpoint of ...
Adachi, Jiro, Ishikawa, Go-o
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On the genericity of spacetime singularities [PDF]
, 2007 We consider here the genericity aspects of spacetime singularities that occur in cosmology and in gravitational collapse. The singularity theorems (that predict the occurrence of singularities in general relativity) allow the singularities of ...
A. K. Raychaudhuri +21 more
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Methis: Studia Humaniora Estonica, 2013 The writings of Jüri Üdi (alter ego of Estonian poet and actor Juhan Viiding, from 1968 to 1978) display the reality of something that could be referred to as a joyful dimension of anguish.
Liisi Rünkla
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Singularities of the eta function of first order differential operators
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2012 We report on a particular case of the paper [7], joint with Raphaël Ponge, showing that generically, the eta function of a first-order differential operator over a closed manifold of dimension n has first-order poles at all positive integers of the form ...
Loya Paul, Moroianu Sergiu
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International Journal of Applied Mechanics and Engineering, 2015 Free vibration analysis of homogeneous and isotropic annular thin plates by using Green’s functions is considered. The formula of the influence function for uniform thin circular and annular plates is presented in closed-form.
K.K. Żur
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Singular Surfaces of Osculating Circles in Three-Dimensional Euclidean Space
Mathematics, 2023 In this paper, we study the surfaces of osculating circles, which are the sets of all osculating circles at all points of regular curves. Since the surfaces of osculating circles may be singular, it is necessary to investigate the singular points of ...
Kemeng Liu, Zewen Li, Donghe Pei
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