Results 1 to 10 of about 726,333 (182)

Relativistic comparison theorems [PDF]

Physical Review A, 2010
6 ...
A. Messiah, Richard L. Hall, W. Greiner
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Local estimates for functionals rotationally invariant with respect to the gradient [PDF]

E-Journal of Analysis and Applied Mathematics, 2022
This paper concerns minimization problems from Calculus of Variations rotationally invariant with respect to the gradient. Inspired by properties associated with results which are valid for elliptic partial differential equations, it presents some local ...
Telma João Santos
doaj   +1 more source

Cohomological comparison theorem [PDF]

Journal of Pure and Applied Algebra, 2015
If $f$ is an idempotent in a ring $ $, then we find sufficient \linebreak conditions which imply that the cohomology rings $\oplus_{n\ge 0}Ext^n_ ( /{\br}, /{\br})$ and \linebreak $\oplus_{n\ge 0}Ext^n_{f f}(f f/f{\br} f,f f/f{\br} f)$ are eventually isomorphic.
Green, Edward L., Madsen, Dag Oskar, Marcos, Eduardo N.   +2 more
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Nonstationary Radiative–Conductive Heat Transfer Problem in a Semitransparent Body with Absolutely Black Inclusions

Mathematics, 2021
The paper is devoted to a nonstationary initial–boundary value problem governing complex heat exchange in a convex semitransparent body containing several absolutely black inclusions.
Andrey Amosov
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A Comparison Theorem [PDF]

Proceedings of the American Mathematical Society, 1971
In this paper the authors consider a pair of differential equations y 1 + p 1 ( x ) y 1 = 0 , y 2
Leighton, Walter, Kian Ke, William Oo
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Plasma Confined Ground and Excited State Helium Atom: A Comparison Theorem Study Using Variational Monte Carlo and Lagrange Mesh Method

Computation, 2021
The energy eigenvalues of the ground state helium atom and lowest two excited states corresponding to the configurations 1s2s embedded in the plasma environment using Hulthén, Debye–Hückel and exponential cosine screened Coulomb model potentials are ...
Salah B. Doma, Mahmoud A. Salem, Kalidas D. Sen   +2 more
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Comparison Theorems on Weighted Finsler Manifolds and Spacetimes with ϵ-Range

Analysis and Geometry in Metric Spaces, 2022
We establish the Bonnet–Myers theorem, Laplacian comparison theorem, and Bishop–Gromov volume comparison theorem for weighted Finsler manifolds as well as weighted Finsler spacetimes, of weighted Ricci curvature bounded below by using the weight function.
Lu Yufeng, Minguzzi Ettore, Ohta Shin-ichi   +2 more
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The Hellmann–Feynman theorem, the comparison theorem, and the envelope theory

Results in Physics, 2015
The envelope theory is a convenient method to compute approximate solutions for bound state equations in quantum mechanics. It is shown that these approximate solutions obey a kind of Hellmann–Feynman theorem, and that the comparison theorem can be ...
Claude Semay
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Methods of extending lower order problems to higher order problems in the context of smallest eigenvalue comparisons

Electronic Journal of Qualitative Theory of Differential Equations, 2011
The theory of $u_{0}$-positive operators with respect to a cone in a Banach space is applied to the linear differential equations $u^{(4)}+\lambda_{1} p(x)u=0$ and $u^{(4)}+\lambda_{2} q(x)u=0$, $0\leq x\leq 1$, with each satisfying the boundary ...
Jeffrey Neugebauer
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Global Attractivity of Symbiotic Model of Commensalism in Four Populations with Michaelis–Menten Type Harvesting in the First Commensal Populations

Axioms, 2022
This article revisits the stability property of a symbiotic model of commensalism with Michaelis–Menten type harvesting in the first commensal populations.
Lili Xu, Yalong Xue, Qifa Lin, Chaoquan Lei   +3 more
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