Results 81 to 90 of about 74,153 (309)

A comparison theorem for selfadjoint operators [PDF]

open access: yesProceedings of the American Mathematical Society, 1991
In this work we shall establish a result concerning the spectral theory of differential operators. Let L 1
openaire   +1 more source

Variational comparison theorem and perturbations of nonlinear systems

open access: yes, 1975
By employing vector Lyapunov-like functions and the theory of systems of differential inequalities, a variational comparison theorem and generalized variation of constants formula are developed.
G. S. Ladde
core   +1 more source

Prediction of Structural Stability of Layered Oxide Cathode Materials: Combination of Machine Learning and Ab Initio Thermodynamics

open access: yesAdvanced Energy Materials, EarlyView.
In this work, we developed a phase‐stability predictor by combining machine learning and ab initio thermodynamics approaches, and identified the key factors determining the favorable phase for a given composition. Specifically, a lower TM ionic potential, higher Na content, and higher mixing entropy favor the O3 phase.
Liang‐Ting Wu   +6 more
wiley   +1 more source

Oscillation of solutions to second-order half-linear differential equations with neutral terms

open access: yesElectronic Journal of Differential Equations, 2013
This article studies the oscillatory behavior of second-order half-linear differential equations with several neutral terms. Some criteria are presented that include those reported in [22].
Tongxing Li   +2 more
doaj  

Representation Theorem for Generators of BSDEs Driven by G-Brownian Motion and Its Applications

open access: yesAbstract and Applied Analysis, 2013
We obtain a representation theorem for the generators of BSDEs driven by G-Brownian motions and then we use the representation theorem to get a converse comparison theorem for G-BSDEs and some equivalent results for nonlinear expectations generated by G ...
Kun He, Mingshang Hu
doaj   +1 more source

An Extension Theorem for Weighted Ricci Curvature on Finsler Manifolds

open access: yesCumhuriyet Science Journal, 2019
Let(M,F) be a forward complete and connected Finsler manifold of dimensional n≥2. In this study, we extend Wan’s extension theorem in Riemannian manifolds to Finsler manifolds by using the weighted Ricci curvatureRicNbounded below.
Yasemin Soylu
doaj   +1 more source

On Cheng's eigenvalue comparison theorem

open access: yesMathematical Proceedings of the Cambridge Philosophical Society, 2008
AbstractWe observe that Cheng's Eigenvalue Comparison Theorem for normal geodesic balls [4] is still valid if we impose bounds on the mean curvature of the distance spheres instead of bounds on the sectional and Ricci curvatures. In this version, there is a weak form of rigidity in case of equality of the eigenvalues.
Bessa, G. Pacelli, Montenegro, J. Fabio
openaire   +2 more sources

The Primitive Comparison Theorem in characteristic $p$

open access: yes
We prove an analogue of Scholze\u27s Primitive Comparison Theorem for proper rigid spaces over an algebraically closed non-archimedean field $K$ of characteristic $p$.
Heuer, Ben
core   +1 more source

Temperature Sensitivity and Adaptation of Cereal Yields: Empirical Evidence From Italy

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT This paper investigates the evolving temperature sensitivity and climate adaptation of cereal yields in Italy from 1952 to 2023, using province‐level data for maize, common wheat, and durum wheat. Employing panel data econometric methods, we estimate yield responses to heat exposure, changes in sensitivity over time, and adaptation to climate ...
Paolo Nota   +2 more
wiley   +1 more source

Investigation of the Oscillatory Properties of Fourth-Order Delay Differential Equations Using a Comparison Approach with First- and Second-Order Equations

open access: yesAxioms
This paper investigates the oscillatory behavior of solutions to fourth-order functional differential equations (FDEs) with multiple delays and a middle term.
Osama Moaaz   +4 more
doaj   +1 more source

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