Results 21 to 30 of about 15,527,868 (309)

Exact model of conformal quintessence

open access: yesPhysical Review D, 2004
19 pages, RevTeX 4, 4 figures, to appear in Phys.
Chimento, Luis Pascual   +2 more
openaire   +3 more sources

Exact quantization conditions for the elliptic Ruijsenaars-Schneider model

open access: yesJournal of High Energy Physics, 2018
We propose and test exact quantization conditions for the N-particle quantum elliptic Ruijsenaars-Schneider integrable system, as well as its Calogero-Moser limit, based on the conjectural correspondence to the five-dimensional N = 1 ∗ $$ \mathcal{N}={1}^
Yasuyuki Hatsuda   +2 more
doaj   +1 more source

EXACT SOLVABILITY OF THE CALOGERO AND SUTHERLAND MODELS [PDF]

open access: yesModern Physics Letters A, 1995
Translationally invariant symmetric polynomials as coordinates for N-body problems with identical particles are proposed. It is shown that in those coordinates the Calogero and Sutherland N-body Hamiltonians, after appropriate gauge transformations, can be presented as a quadratic polynomial in the generators of the algebra sl N in finitedimensional ...
Rühl, Werner, Turbiner, Alexander
openaire   +2 more sources

exact-real

open access: yes, 2021
exact-real is a C++/Python library which provides exact lazy computations in the Real Numbers. In particular it implements arithmetic and comparisons of (random) transcendental numbers.Please visit our home page for more ...
Rüth, Julian
core   +1 more source

Statistical tests under Dallal's model: Asymptotic and exact methods.

open access: yesPLoS ONE, 2020
This paper proposes asymptotic and exact methods for testing the equality of correlations for multiple bilateral data under Dallal's model. Three asymptotic test statistics are derived for large samples.
Zhiming Li, Changxing Ma, Mingyao Ai
doaj   +1 more source

Exact scaling in competitive growth models [PDF]

open access: yesPhysical Review E, 2005
11 pages, 6 ...
Braunstein, LA, Lam, CH
openaire   +4 more sources

Exact Model Reduction for Continuous-Time Open Quantum Dynamics [PDF]

open access: yesQuantum
We consider finite-dimensional many-body quantum systems described by time-independent Hamiltonians and Markovian master equations, and present a systematic method for constructing smaller-dimensional, reduced models that $exactly$ reproduce the time ...
Tommaso Grigoletto   +3 more
doaj   +1 more source

Exact Inference for Integrated Population Modelling [PDF]

open access: yesBiometrics, 2019
AbstractIntegrated population modelling is widely used in statistical ecology. It allows data from population time series and independent surveys to be analysed simultaneously. In classical analysis the time-series likelihood component can be conveniently approximated using Kalman filter methodology. However, the natural way to model systems which have
P. Besbeas, B.J.T. Morgan
openaire   +3 more sources

A behavioral approach to linear exact modeling [PDF]

open access: yesIEEE Transactions on Automatic Control, 1993
Summary: The behavioral approach to system theory provides a parameter-free framework for the study of the general problem of linear exact modeling and recursive modeling. The main contribution of this paper is the solution of the (continuous-time) polynomial-exponential time series modeling problem.
ANTOULAS, AC, WILLEMS, JC
openaire   +4 more sources

Exact Solutions in Modified Gravity Models [PDF]

open access: yesEntropy, 2012
We review the exact solutions in modified gravity. It is one of the main problems of mathematical physics for the gravity theory. One can obtain an exact solution if the field equations reduce to a system of ordinary differential equations. In this paper we consider a number of exact solutions obtained by the method of separation of variables.
Valery V. Obukhov, Andrey N. Makarenko
openaire   +4 more sources

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