Results 21 to 30 of about 8,524,171 (298)

QCD and the chiral critical point [PDF]

open access: yesPhysical Review D, 1994
As an extension of $QCD$, consider a theory with ``$2+1$'' flavors, where the current quark masses are held in a fixed ratio as the overall scale of the quark masses is varied. At nonzero temperature and baryon density it is expected that in the chiral limit the chiral phase transition is of first order.
Gavin, S., Gocksch, A., Pisarski, R. D.
openaire   +3 more sources

Simple dynamical systems

open access: yesApplied General Topology, 2019
In this paper, we study the class of simple systems on R induced by homeomorphisms having finitely many non-ordinary points. We characterize the family of homeomorphisms on R having finitely many non-ordinary points upto (order) conjugacy.
K. Ali Akbar   +2 more
doaj   +1 more source

Investigation of spectrum curves for a Sturm-Liouville problem with two-point nonlocal boundary conditions

open access: yesMathematical Modelling and Analysis, 2020
The article investigates the Sturm–Liouville problem with one classical and another nonlocal two-point boundary condition. We analyze zeroes, poles and critical points of the characteristic function and how the properties of this function depend on ...
Kristina Bingelė   +2 more
doaj   +1 more source

Existence and multiplicity results for nonlinear problems involving the p(x)-Laplace operator [PDF]

open access: yesOpuscula Mathematica, 2014
In this paper we study the following nonlinear boundary-value problem \[-\Delta_{p(x)} u=\lambda f(x,u) \quad \text{ in } \Omega,\] \[|\nabla u|^{p(x)-2}\frac{\partial u}{\partial \nu}+\beta(x)|u|^{p(x)-2}u=\mu g(x,u) \quad \text{ on } \partial\Omega ...
Najib Tsouli, Omar Darhouche
doaj   +1 more source

B-critical points [PDF]

open access: yes, 2011
We examine in this paper so-called B-critical points of linear, time-varying differential-algebraic equations (DAEs) of the form A(t)(D(t)x(t))' + B(t)x(t) = q(t). These critical or singular points, which cannot be handled by classical projector methods,
März, Roswitha, Riaza, Ricardo
core   +1 more source

Using Sigmoid Growth Models to Simulate Greenhouse Tomato Growth and Development

open access: yesHorticulturae, 2022
Mathematical modeling has been used to describe the characteristics of crop growth. Establishing a growth model can help to better understand the responses of crops to their environment and improve the efficiency of agricultural production.
Shih-Lun Fang   +6 more
doaj   +1 more source

On quasilinear elliptic problems with finite or infinite potential wells

open access: yesOpen Mathematics, 2021
We consider quasilinear elliptic problems of the form −div(ϕ(∣∇u∣)∇u)+V(x)ϕ(∣u∣)u=f(u),u∈W1,Φ(RN),-{\rm{div}}\hspace{0.33em}(\phi \left(| \nabla u| )\nabla u)+V\left(x)\phi \left(| u| )u=f\left(u),\hspace{1.0em}u\in {W}^{1,\Phi }\left({{\mathbb{R}}}^{N}),
Liu Shibo
doaj   +1 more source

Comparative analysis of limit standards for contaminants in edible vegetable oils between domestic and international regulations

open access: yesZhongguo shipin weisheng zazhi
This paper conducts a comprehensive comparison and analysis of domestic and international standards pertaining to high-risk contaminants in edible vegetable oils, including solvent residues, polycyclic aromatic hydrocarbons, mycotoxins, heavy metals, 3 ...
GAO Yuan   +6 more
doaj   +1 more source

Existence of Nontrivial Solutions for Sixth-Order Differential Equations

open access: yesMathematics, 2021
We show the existence of at least one nontrivial solution for a nonlinear sixth-order ordinary differential equation is investigated. Our approach is based on critical point theory.
Gabriele Bonanno   +2 more
doaj   +1 more source

Qualitative Analysis of the Dynamics of a Two-Component Chiral Cosmological Model

open access: yesUniverse, 2020
We present a qualitative analysis of chiral cosmological model (CCM) dynamics with two scalar fields in the spatially flat Friedman–Robertson–Walker Universe.
Viktor Zhuravlev, Sergey Chervon
doaj   +1 more source

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