Results 11 to 20 of about 61,137 (267)
Existence of solutions for second-order perturbed nonconvex sweeping process
Computers & Mathematics with Applications, 2011 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dalila Azzam-Laouir, Sabrina Izza
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Anti-BRST in the Causal Approach
Universe, 2021 It is known that the elimination of anomalies in all orders of perturbation theory is an open problem. The constraints given by usual invariance properties and the Wess–Zumino identities are not enough to eliminate the anomalies in the general case of a ...
Dan-Radu Grigore
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Multiple solutions of perturbed superquadratic second order Hamiltonian systems [PDF]
Transactions of the American Mathematical Society, 1989 This interesting paper deals with the Hamiltonian system \(\ddot q+\text{grad} V(q)=f(t),\) where \(f\in L^ 2([0,T],{\mathbb{R}}^ n)\) is a T- periodic function and \(V\in C^ 1({\mathbb{R}}^ n,{\mathbb{R}})\) fulfils the following condition: \(00\) and some \(\mu >2\).
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Domain perturbations and estimates for the solutions of second order elliptic equations
Journal de Mathématiques Pures et Appliquées, 2002 This paper is concerned with the dependence of the variational solution of a Dirichlet problem for a second order elliptic equation with respect to perturbations of the domain. Some estimates for the difference of two solutions in two open sets are obtained, with respect to the ``distance'' between the two sets and suitable geometrical parameters ...
SAVARE', GIUSEPPE +1 more
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AIP Advances, 2014 A new and effective analytical perturbation method is presented for the multipole acoustic logging in a transversely isotropic medium (TIM), whose symmetric principal axis is parallel to the borehole axis and the exact solutions could be found.
L. Zhang +3 more
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Nonlinear Analysis, 2021 In this paper, we investigate a class of fractional hybrid differential equations with impulses, which can be seen as nonlinear differential equations with a quadratic perturbation of second type and a linear perturbation in partially ordered Banach ...
Jin You, Zhenlai Han
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Mathematics, 2020 This paper is proposed for solving a partial differential equation of second order with a fractional derivative with respect to time (the vibration string equation), where the fractional derivative order is in the range from zero to two.
Temirkhan S. Aleroev, Asmaa M. Elsayed
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Application of Perturbation Theory to a Master Equation
Advances in Mathematical Physics, 2016 We develop a matrix perturbation method for the Lindblad master equation. The first- and second-order corrections are obtained and the method is generalized for higher orders.
B. M. Villegas-Martínez +2 more
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Attainability set of a mechanical controlable system and conditions of robust stability
Revista Iberoamericana de Automática e Informática Industrial RIAI, 2020 In this work, the boundary of the attainabbility set of a second order differential equation with an external perturbation is determined numerically, using the solution of the problem of the maximum variation of the oscillation amplitudes of its ...
R. Temoltzi-Ávila, R Ávila-Pozos
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Mathematics, 2022 The biparametric perturbation method is applied to solve the improved Föppl–von Kármán equation, in which the improvements of equations come from two different aspects: the first aspect concerns materials, and the other is from deformation.
Xiao-Ting He +3 more
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