Results 31 to 40 of about 21,807,131 (299)

WZNW Models from Non-Standard Bilinear Forms [PDF]

open access: yes, 1996
We study the WZNW models based on nonstandard bilinear forms. We approach the problem from algebraic, perturbative and functional exact methods. It is shown that even in the case of integer $k$ we can find irrational CFT's.
Arfaei, H., Parvizi, S.
core   +2 more sources

On Nonstandard Vacuua in Minimal Supergravity Models [PDF]

open access: yesJournal of High Energy Physics, 2003
The plethora of scalar fields participating in the formulation of a softly broken supersymmetric theory can threat the stability of the standard vacuum. The generic situation is twofold. Directions in scalar field space may exist along which the potential becomes unbounded from below or local minima deeper than the standard one are likely to appear ...
Gioutsos, D. V., Vayonakis, C. E.
openaire   +3 more sources

Qualitatively Stable Nonstandard Finite Difference Scheme for Numerical Solution of the Nonlinear Black–Scholes Equation

open access: yesJournal of Mathematics, 2021
In this paper, we use a numerical method for solving the nonlinear Black–Scholes partial differential equation of the European option under transaction costs, which is based on the nonstandard discretization of the spatial derivatives.
Mohammad Mehdizadeh Khalsaraei   +3 more
doaj   +1 more source

Integrable cosmological models with an additional scalar field

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
We consider modified gravity cosmological models that can be transformed into two-field chiral cosmological models by the conformal metric transformation.
Vsevolod R. Ivanov, Sergey Yu. Vernov
doaj   +1 more source

A New Numerical Scheme for Time Fractional Diffusive SEAIR Model with Non-Linear Incidence Rate: An Application to Computational Biology

open access: yesFractal and Fractional, 2022
In this paper, we propose a modified fractional diffusive SEAIR epidemic model with a nonlinear incidence rate. A constructed model of fractional partial differential equations (PDEs) is more general than the corresponding model of fractional ordinary ...
Yasir Nawaz   +2 more
doaj   +1 more source

Racial disparities in receipt of standard chemoradiation in anal squamous cell carcinoma, an analysis of the National Cancer Database

open access: yesCancer Medicine, 2021
Background Standard treatment for locally advanced anal squamous cell carcinoma (SCC) consists of concurrent chemoradiation. We evaluated whether racial differences exist in the receipt of standard treatment and its association with survival.
Shelly X. Bian   +2 more
doaj   +1 more source

Finite Embeddability of Sets and Ultrafilters [PDF]

open access: yes, 2015
A set A of natural numbers is finitely embeddable in another such set B if every finite subset of A has a rightward translate that is a subset of B. This notion of finite embeddability arose in combinatorial number theory, but in this paper we study it ...
Blass, Andreas, Di Nasso, Mauro
core   +3 more sources

Nonstandard foundations of equilibrium search models [PDF]

open access: yesJournal of Economic Theory, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Observational Tests and Predictive Stellar Evolution. II. Nonstandard Models [PDF]

open access: yes, 2004
We examine contributions of second-order physical processes to the results of stellar evolution calculations that are amenable to direct observational testing. In the first paper in the series, we established baseline results using only physics that were
P. Young, D. Arnett
semanticscholar   +1 more source

A new crossover dynamics mathematical model of monkeypox disease based on fractional differential equations and the Ψ-Caputo derivative: Numerical treatments

open access: yesAlexandria Engineering Journal
A novel crossover model for monkeypox disease that incorporates Ψ-Caputo fractional derivatives is presented here, where we use a simple nonstandard kernel function Ψ(t).
N.H. Sweilam   +3 more
doaj   +1 more source

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