Buscar recursos académicos

Materias / palabras clave: Science: Mathematics

Materias / palabras clave: nonlinear mathematical physics, nonlinear continuous and discrete equations of mathematical physics, integrability and non-integrability of continuous and discrete systems, painlevé analysis, geometry of soliton equatio...

Materias / palabras clave: mathematical physics; Science: Physics

The implementation of the functioning of fractals and fractality for open and holistic systems of physical and mathematical education is substantiated. It is shown that it is thanks to fractality that the synergy of the ...

This study presents the dynamical analysis and soliton solutions of the Chaffee–Infante equation, an important nonlinear evolution model. The Chaffee Infante equation, widely employed as a reaction–diffusion model, i...

Abstract The Carroll group arises in the vanishing speed of light limit of the Poincaré group and was initially discarded as just a mathematical curiosity. However, recent developments have proved otherwise. Carroll and...

In the framework of density functional theory, scaling and the virial theorem are essential tools for deriving the exact properties of density functionals. Preexisting mathematical difficulties in deriving the virial the...

Recently, it has been proposed by Maldacena that large N limits of certain conformal field theories in d dimensions can be described in terms of supergravity (and string theory) on the product of d 4-1dimensional AdS spa...

We show that the large N limit of certain conformal field theories in various dimensions include in their Hilbert space a sector describing supergravity on the product of Anti-deSitter spacetimes, spheres and other compa...

Materias / palabras clave: Communication theory; Computer science; Physics; Theoretical physics; Mathematics; Statistics

First Page

Received 4 November 1964DOI:https://doi.org/10.1103/PhysicsPhysiqueFizika.1.195Copyright © 1964 Physics Publishing Co.

We propose a simple analytic representation of the correlation energy ${\mathrm{\ensuremath{\varepsilon}}}_{\mathit{c}}$ for a uniform electron gas, as a function of density parameter ${\mathit{r}}_{\mathit{s}}$ and rela...

Nos\'e has modified Newtonian dynamics so as to reproduce both the canonical and the isothermal-isobaric probability densities in the phase space of an N-body system. He did this by scaling time (with s) and distance (wi...

A density-functional formalism comparable to the Hohenberg-Kohn-Sham theory of the ground state is developed for arbitrary time-dependent systems. It is proven that the single-particle potential $v(\stackrel{\ensuremath{...

Materias / palabras clave: Physics; String field theory; Non-critical string theory; Relationship between string theory and quantum field theory; Heterotic string theory; Supergravity; String (physics); String theory; String duality; Mathematical ...

For the molecules Be 2 , F 2 , and P 2 of Table For these broken-symmetry solutions, the UHF atomization energies become 17, 220, and 141 kcalmol, respectively, and the mean absolute error of all the UHF atomization ener...

An unknown quantum state \ensuremath{\Vert}\ensuremath{\varphi}〉 can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical Einstein-Podolsky-Rosen (EPR) correlations....

Materias / palabras clave: Massless particle; Dirac fermion; Graphene; Fermion; Physics; Dirac (video compression format); Mathematical physics; Quantum mechanics; Neutrino

Materias / palabras clave: Physics; Event horizon; Black hole (networking); Black hole thermodynamics; Gravitation; Entropy (arrow of time); Baryon; Micro black hole; Quantum mechanics; Event (particle physics); Particle physics; Computer network

A number of extensions to the multisolution approach to the crystallographic phase problem are discussed in which the negative quartet relations play an important role. A phase annealing method, related to the simulated ...

First Page

Abstract This paper discusses the applicability of statistics to a wide field of problems. Examples of simple and complex distributions are given.

This paper uses an intertemporal general equilibrium asset pricing model to study the term structure of interest rates. In this model, anticipations, risk aversion, investment alternatives, and preferences about the timi...