Results 1 to 10 of about 1,983 (102)

Low-rank matrix approximations over canonical subspaces

Journal of Numerical Analysis and Approximation Theory, 2020
In this paper we derive closed form expressions for the nearest rank-\(k\) matrix on canonical subspaces.    We start by studying three kinds of subspaces.  Let \(X\) and \(Y\) be a pair of given matrices. The first subspace contains all the \(m\times
Achiya Dax
doaj   +7 more sources

Physics of the Non-Abelian Coulomb Phase: Insights from Pad\'e Approximants [PDF]

, 2017
We consider a vectorial, asymptotically free SU($N_c$) gauge theory with $N_f$ fermions in a representation $R$ having an infrared (IR) fixed point.
Ryttov, Thomas A., Shrock, Robert
core   +3 more sources

Partition of unity interpolation using stable kernel-based techniques [PDF]

, 2016
In this paper we propose a new stable and accurate approximation technique which is extremely effective for interpolating large scattered data sets.
Cavoretto, R., De Marchi, S., De Rossi, A., Perracchione, E., Santin, G.   +4 more
core   +1 more source

Indications for the Nonexistence of Three-Neutron Resonances near the Physical Region [PDF]

, 2002
The pending question of the existence of three-neutron resonances near the physical energy region is reconsidered. Finite rank neutron-neutron forces are used in Faddeev equations, which are analytically continued into the unphysical energy sheet below ...
A. Csoto, A. Csoto, A. Csoto,, A. Matsuyama, A. Setz, B. S. Pudliner, D. Gogny, D. R. Thompson, D. R. Tilley, F. M. Margues, H. Witała, I. Reichstein, J. P. Naisse, J. R. Reid, J. Sperinde, K. Möller, M. Yuly, N. Tanaka, P. Heiss, R. Offermann, S. A. Coon, S. A. Sofianos, V. G. Stoks, V. I. Kukulin, W. Glöckle, W. Schweiger   +25 more
core   +4 more sources

A Precessing Numerical Relativity Waveform Surrogate Model for Binary Black Holes: A Gaussian Process Regression Approach [PDF]

, 2020
Gravitational wave astrophysics relies heavily on the use of matched filtering both to detect signals in noisy data from detectors, and to perform parameter estimation on those signals.
Clark, James A, Gair, Jonathan, Heng, Ik Siong, Khamesra, Bhavesh, Williams, Daniel   +4 more
core   +2 more sources

From bound states to resonances: analytic continuation of the wave function [PDF]

, 2000
Single-particle resonance parameters and wave functions in spherical and deformed nuclei are determined through analytic continuation in the potential strength.
A.A. Sonzogni, B. Gyarmati, E. Maglione, E. Maglione, E. Maglione, E. Maglione, G. Cattapan, J.R. Taylor, L.S. Ferreira, N. Hokkyo, N. Tanaka, N. Tanaka, P.J. Woods, S. Cwiok, T. Vertse, T. Vertse, V.I. Kukulin, V.I. Kukulin, W.J. Romo, Y.B. Zel’dovich, Y.K. Ho   +20 more
core   +3 more sources

Interpolation Parameter and Expansion for the Three Dimensional Non-Trivial Scalar Infrared Fixed Point [PDF]

, 1996
We compute the non--trivial infrared $\phi^4_3$--fixed point by means of an interpolation expansion in fixed dimension. The expansion is formulated for an infinitesimal momentum space renormalization group.
A. M. Ferrenberg, B. Nickel, B. Nickel, C. Bagnuls, C. Wieczerkowski, G. Gallavotti, H. Koch, J. C. Guillou, J. C. Guillou, J. Polchinski, J. Rolf, K. Newman, K. Wilson, K. Wilson, K. Wilson, T. Reisz   +15 more
core   +2 more sources

Higher-Loop Corrections to the Infrared Evolution of a Gauge Theory with Fermions

, 2011
We consider a vectorial, asymptotically free gauge theory and analyze the effect of higher-loop corrections to the beta function on the evolution of the theory from the ultraviolet to the infrared.
A. Deuzeman, D. J. Gross, F. Sannino, G. Fleming, Robert Shrock, S. Catterall, S. J. Brodsky, T. Appelquist, Thomas A. Ryttov, X.-Y. Jin, Z. Fodor   +10 more
core   +1 more source

Scheme-Independent Calculations of Physical Quantities in an ${\cal N}=1$ Supersymmetric Gauge Theory [PDF]

, 2017
We consider an asymptotically free, vectorial, ${\cal N}=1$ supersymmetric gauge theory with gauge group $G$ and $N_f$ pairs of chiral superfields in the respective representations ${\cal R}$ and $\bar {\cal R}$ of $G$, having an infrared fixed point ...
Ryttov, Thomas A., Shrock, Robert
core   +2 more sources

Greene's Residue Criterion for the Breakup of Invariant Tori of Volume-Preserving Maps [PDF]

, 2012
Invariant tori play a fundamental role in the dynamics of symplectic and volume-preserving maps. Codimension-one tori are particularly important as they form barriers to transport.
Adam M. Fox, Apte, Arnold, Artuso, Artuso, Bogoyavlenskij, Bollt, Borgonovi, Broer, Cartwright, Cassels, Celletti, Cheng, Cheng, Chirikov, Cusick, del Castillo-Negrete, Delshams, Dennis, De~La~Llave, Dullin, Falcolini, Feingold, Froeschlé, Greene, Greene, Hardy, James D. Meiss, Khanin, Kim, Kook, Kurosaki, Lagarias, Lamb, Lochak, Lomelí, MacKay, MacKay, MacKay, MacKay, MacKay, MacKay, Meier, Meiss, Meiss, Percival, Piro, Pöschel, Roberts, Thyagaraja, Tompaidis, Tompaidis, Tompaidis, Vrahatis, Xia, Zhou, Zhou   +56 more
core   +3 more sources