Results 21 to 30 of about 772,908 (331)

Stochastic Hyperbolic Systems, Small Perturbations and Pathwise Approximation [PDF]

open access: yes, 2020
This paper is devoted to the study of hyperbolic systems of linear partial differential equations perturbed by a Brownian motion. The existence and uniqueness of solutions are proved by an energy method.
Aboulalaa, Adnan
core   +1 more source

A note on coupled nonlinear Schrödinger equations

open access: yesAdvances in Nonlinear Analysis, 2014
We investigate the initial value problem for some coupled nonlinear Schrödinger equations in two space dimensions with exponential growth. We prove global well-posedness and scattering in the defocusing case. In the focusing sign, existence of non-global
Saanouni Tarek
doaj   +1 more source

Global well-posedness of some high-order focusing semilinear evolution equations with exponential nonlinearity

open access: yesAdvances in Nonlinear Analysis, 2018
In even space dimensions, the initial value problems for some high-order focusing semilinear evolution equations with exponential nonlinearities are considered.
Saanouni Tarek
doaj   +1 more source

On classical symmetries of ordinary differential equations related to stationary integrable partial differential equations [PDF]

open access: yesOpuscula Mathematica, 2021
We study the relationship between the solutions of stationary integrable partial and ordinary differential equations and coefficients of the second-order ordinary differential equations invariant with respect to one-parameter Lie group.
Ivan Tsyfra
doaj   +1 more source

On the Carleman classes of vectors of a scalar type spectral operator

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
The Carleman classes of a scalar type spectral operator in a reflexive Banach space are characterized in terms of the operator's resolution of the identity. A theorem of the Paley-Wiener type is considered as an application.
Marat V. Markin
doaj   +1 more source

Existence, uniqueness, and convergence rates for gradient flows in the training of artificial neural networks with ReLU activation

open access: yesElectronic Research Archive, 2023
The training of artificial neural networks (ANNs) with rectified linear unit (ReLU) activation via gradient descent (GD) type optimization schemes is nowadays a common industrially relevant procedure.
Simon Eberle   +3 more
doaj   +1 more source

A characterization of the generators of analytic C0-semigroups in the class of scalar type spectral operators

open access: yesAbstract and Applied Analysis, 2004
In the class of scalar type spectral operators in a complex Banach space, a characterization of the generators of analytic C0-semigroups in terms of the analytic vectors of the operators is found.
Marat V. Markin
doaj   +1 more source

A Variational Model for Data Fitting on Manifolds by Minimizing the Acceleration of a Bézier Curve

open access: yesFrontiers in Applied Mathematics and Statistics, 2018
We derive a variational model to fit a composite Bézier curve to a set of data points on a Riemannian manifold. The resulting curve is obtained in such a way that its mean squared acceleration is minimal in addition to remaining close the data points. We
Ronny Bergmann   +1 more
doaj   +1 more source

Global existence and dynamic structure of solutions for damped wave equation involving the fractional Laplacian

open access: yesDemonstratio Mathematica, 2021
We consider strong damped wave equation involving the fractional Laplacian with nonlinear source. The results of global solution under necessary conditions on the critical exponent are established.
Bidi Younes   +3 more
doaj   +1 more source

On the oscillation of certain class of conformable Emden-Fowler type elliptic partial differential equations

open access: yesAIMS Mathematics, 2023
This article examines the oscillatory behaviour of solutions to a particular class of conformable elliptic partial differential equations of the Emden-Fowler type.
S. S. Santra   +6 more
doaj   +1 more source

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