Results 11 to 20 of about 1,588 (189)

On the Descriptional Complexity of Operations on Semilinear Sets [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2017
We investigate the descriptional complexity of operations on semilinear sets. Roughly speaking, a semilinear set is the finite union of linear sets, which are built by constant and period vectors.
Simon Beier   +2 more
doaj   +1 more source

Existence for semilinear equations on exterior domains

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
In this paper we study radial solutions of $\Delta u + K(r)f(u)= 0$ on the exterior of the ball of radius $R>0$ centered at the origin in ${\mathbb R}^{N}$ where $f$ is odd with $f0$ on $(\beta, \infty),$ and $f$ superlinear.
Joseph Iaia
doaj   +1 more source

A NSFD Discretization of Two-Dimensional Singularly Perturbed Semilinear Convection-Diffusion Problems

open access: yesFrontiers in Applied Mathematics and Statistics, 2022
Despite the availability of an abundant literature on singularly perturbed problems, interest toward non-linear problems has been limited. In particular, parameter-uniform methods for singularly perturbed semilinear problems are quasi-non-existent.
Olawale O. Kehinde   +2 more
doaj   +1 more source

A solution to a fractional order semilinear equation using variational method

open access: yesMathematics in Applied Sciences and Engineering, 2020
We will discuss how we obtain a solution to a semilinear pseudo-differential equation involving fractional power of laplacian by using a method analogous to the direct method of calculus of variations.
Ramesh Karki, Young Hwan You
doaj   +1 more source

A characterization of semilinear sets

open access: yesJournal of Computer and System Sciences, 1970
In this report, the class of semilinear sets is shown to be the least class of sets which contains all of the stratified semilinear sets and is closed under finite intersection.
Leonard Y. Liu, Peter Weiner
openaire   +1 more source

Controllability of time varying semilinear non-instantaneous impulsive systems with delay, and nonlocal conditions [PDF]

open access: yesArchives of Control Sciences, 2022
In this paper we prove the exact controllability of a time varying semilinear system considering non-instantaneous impulses, delay, and nonlocal conditions occurring simultaneously.
Dalia Cabada   +3 more
doaj   +1 more source

Null controllability of a semilinear degenerate parabolic equation with a gradient term

open access: yesBoundary Value Problems, 2020
This paper concerns the null controllability of a semilinear control system governed by degenerate parabolic equation with a gradient term, where the nonlinearity of the problem is involved with the first derivative. We first establish the well-posedness
Fengdan Xu, Qian Zhou, Yuanyuan Nie
doaj   +1 more source

AFL with the semilinear property

open access: yesJournal of Computer and System Sciences, 1971
A slip language is a language whose Parikh mapping is a semilinear set. A slip family is a family containing only slip languages. The purpose of this paper is to study slip AFL. A sufficiency condition is given on a slip family which ensures that the family generates a slip AFL.
Seymour Ginsburg, Edwin H. Spanier
openaire   +1 more source

New discussion concerning to optimal control for semilinear population dynamics system in Hilbert spaces

open access: yesNonlinear Analysis, 2022
The objective of our paper is to investigate the optimal control of semilinear population dynamics system with diffusion using semigroup theory. The semilinear population dynamical model with the nonlocal birth process is transformed into a standard ...
Rohit Patel   +4 more
doaj   +1 more source

Poincaré problem with measurable data for semilinear Poisson equation in the plane

open access: yesДоповiдi Нацiональної академiї наук України, 2022
We study the Poincaré boundary-value problem with measurable in terms of the logarithmic capacity boundary data for semilinear Poisson equations defined either in the unit disk or in Jordan domains with quasihyperbolic boundary condition.
V.Ya. Gutlyanskiĭ   +3 more
doaj   +1 more source

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