Results 31 to 40 of about 24,650 (145)

Heat kernels on curved cones

, 1994
A functorial derivation is presented of a heat-kernel expansion coefficient on a manifold with a singular fixed point set of codimension two. The existence of an extrinsic curvature term is pointed out.Comment: 4p.,sign errors corrected and a small ...
Brüning J, Cheeger J, Donnelly H, Dowker J S, Dowker J S, Dowker J S, Fursaev D V, Hawking S W, J S Dowker, Kennedy G   +9 more
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Constraints on Area Variables in Regge Calculus [PDF]

, 2000
We describe a general method of obtaining the constraints between area variables in one approach to area Regge calculus, and illustrate it with a simple example. The simplicial complex is the simplest tessellation of the 4-sphere.
Barrett J W, Jarmo Mäkelä, Mäkelä J, Mäkelä J, Ruth M Williams   +4 more
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Singular integral equations with Cauchy kernels [PDF]

Transactions of the American Mathematical Society, 1946
Not ...
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Gap Probabilities for Edge Intervals in Finite Gaussian and Jacobi Unitary Matrix Ensembles

, 2000
The probabilities for gaps in the eigenvalue spectrum of the finite dimension $ N \times N $ random matrix Hermite and Jacobi unitary ensembles on some single and disconnected double intervals are found. These are cases where a reflection symmetry exists
, Bureau F, Bureau F, Chazy J, Chazy J, Christopher M Cosgrove, Cosgrove C M, Fokas A S, Fokas A S, Forrester P J, Its A R, Muirhead R J, N S Witte, P J Forrester, Szegö G, Tracy C A, Tracy C A, Tracy C A   +17 more
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Nonequilibrium Electron Distribution in Presence of Kondo Impurities

, 2001
We study the energy relaxation of quasiparticles in voltage biased mesoscopic wires in presence of magnetic impurities. The renormalization of the exchange interaction of Kondo impurities coupled to conduction electrons is extended to the case of a ...
A. C. Hewson, A. Kaminski, A. Zawadowski, B. L. Altshuler, B. L. Altshuler, C. Kittel, C. V. Haesendonck, D. R. Hamann, D. S. Golubev, E. Müller-Hartmann, Georg Göppert, H. Pothier, H. Pothier, Hermann Grabert, J. Kroha, J. Solyom, J. Zittartz, J. Zittartz, K. E. Nagaev, P. Mohanty, Y. Imry, Y. Nagaoka   +21 more
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Failure of the ladder approximation to QCD

, 2005
The proof of the failure of the ladder approximation to QCD is given in manifestly gauge-invariant way. This proof is valid for the full gluon propagator and for all types of quarks.
Ball, Ball, Bender, Bhagwat, Chang, Field, Fischer, Gasser, Gogohia, Gogohia, Gogohia, Higashijima, Kumar, Ladanyi, Marciano, Miransky, Tandy, V. Gogohia, Wang, Wang   +19 more
core   +1 more source

Fractal Spacetime Structure in Asymptotically Safe Gravity

, 2005
Four-dimensional Quantum Einstein Gravity (QEG) is likely to be an asymptotically safe theory which is applicable at arbitrarily small distance scales. On sub-Planckian distances it predicts that spacetime is a fractal with an effective dimensionality of
A. Bonanno, A. Bonanno, A. Bonanno, D. ben-Avraham, D. Dou, E. Bentivegna, For a review see: J. Berges, J. Ambjørn, J. Ambjørn, J. Polonyi, J.R. Brownstein, J.R. Brownstein, J.W. Moffat, M. Niedermaier, M. Reuter, M. Reuter, Martin Reuter, O. Lauscher, Oliver Lauscher, P. Forgács, R. Percacci, R. Percacci, S. Weinberg in, T.R. Morris   +23 more
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Parabolic Integrodifferential Equations with Singular Kernels

Journal of Integral Equations and Applications, 1991
The parabolic integrodifferential Volterra equation \((\Delta\) is the Laplacian) \[ u_ t(t,x)=(\Delta+c)\int^ t_ 0k(t-s)u(s,x)ds+k_ 0u(t,x)+f(t,x), \] \(t\in[0,T]\), \(x\in\Omega\subset R^ n\), \(u(0,x)=u_ 0(x)\), is considered. The set \(\Omega\) is assumed to be bounded; \(c\) and \(k_ 0\) are real constants.
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Kernel autoregressive models using Yule–Walker equations [PDF]

Signal Processing, 2013
This paper proposes nonlinear autoregressive (AR) models for time series, within the framework of kernel machines. Two models are investigated. In the first proposed model, the AR model is defined on the mapped samples in the feature space. In order to predict a future sample, this formulation requires to solve a pre-image problem to get back to the ...
Kallas, Maya, Honeine, Paul, Francis, Clovis, Amoud, Hassan   +3 more
openaire   +3 more sources

Scattering kernels for the muon diffusion equation [PDF]

Physical Review A, 1988
Diffusion of muonic hydrogen atoms in gaseous hydrogen is studied. Scattering kernels are derived from the kinematics of an inelastic binary collision. The effect of rotations of the hydrogen molecules is treated by defining and computing an effective inelastic energy transfer Q/sub eff/.
Rusjan, Edmond, Zweifel, Paul F.
openaire   +2 more sources