Results 1 to 10 of about 98 (90)

Singularity for a nonlinear degenerate hyperbolic-parabolic coupled system arising from nematic liquid crystals

open access: yesAdvances in Nonlinear Analysis, 2022
This article focuses on the singularity formation of smooth solutions for a one-dimensional nonlinear degenerate hyperbolic-parabolic coupled system originating from the Poiseuille flow of nematic liquid crystals.
Hu Yanbo
doaj   +1 more source

Dirichlet problems involving the Hardy-Leray operators with multiple polars

open access: yesAdvances in Nonlinear Analysis, 2023
Our aim of this article is to study qualitative properties of Dirichlet problems involving the Hardy-Leray operator ℒV≔−Δ+V{{\mathcal{ {\mathcal L} }}}_{V}:= -\Delta +V, where V(x)=∑i=1mμi∣x−Ai∣2V\left(x)={\sum }_{i=1}^{m}\frac{{\mu }_{i}}{{| x-{A}_{i}| }
Chen Huyuan, Chen Xiaowei
doaj   +1 more source

Blowup in L1(Ω)-norm and global existence for time-fractional diffusion equations with polynomial semilinear terms

open access: yesAdvances in Nonlinear Analysis, 2023
This article is concerned with semilinear time-fractional diffusion equations with polynomial nonlinearity up{u}^{p} in a bounded domain Ω\Omega with the homogeneous Neumann boundary condition and positive initial values.
Floridia Giuseppe   +2 more
doaj   +1 more source

Bounds for blow-up time in a semilinear parabolic problem with variable exponents

open access: yes, 2022
This report deals with a blow-up of the solutions to a class of semilinear parabolic equations with variable exponents nonlinearities. Under some appropriate assumptions on the given data, a more general lower bound for a blow-up time is obtained if the ...
ABITA, Rahmoune   +1 more
core   +2 more sources

On a Class of Reaction-Diffusion Equations with Aggregation

open access: yesAdvanced Nonlinear Studies, 2021
In this paper, global-in-time existence and blow-up results are shown for a reaction-diffusion equation appearing in the theory of aggregation phenomena (including chemotaxis).
Chen Li   +2 more
doaj   +1 more source

Lack of smoothing for bounded solutions of a semilinear parabolic equation

open access: yesAdvances in Nonlinear Analysis, 2020
We study a semilinear parabolic equation that possesses global bounded weak solutions whose gradient has a singularity in the interior of the domain for all t > 0.
Fila Marek, Lankeit Johannes
doaj   +1 more source

Nonexistence of global solutions to Klein-Gordon equations with variable coefficients power-type nonlinearities

open access: yesOpen Mathematics, 2023
In this article, we investigate the Cauchy problem for Klein-Gordon equations with combined power-type nonlinearities. Coefficients in the nonlinearities depend on the space variable.
Kolkovska Natalia   +2 more
doaj   +1 more source

On Removable Singularities of Solutions of Higher-Order Differential Inequalities

open access: yesAdvanced Nonlinear Studies, 2020
We obtain sufficient conditions for solutions of the mth-order differential ...
Kon’kov A. A., Shishkov A. E.
doaj   +1 more source

Finite time blow-up for quasilinear wave equations with nonlinear dissipation

open access: yes, 2022
In this paper we consider a class of quasilinear wave equations utt − ∆αu − ω1∆ut − ω2∆βut + µ|ut|m−2ut = |u|p−2u, associated with initial and Dirichlet boundary conditions.
KERKER , Mohamed Amine
core   +1 more source

Global nonexistence and blow-up results for a quasi-linear evolution equation with variable-exponent nonlinearities

open access: yes, 2021
In this paper, we consider a class of quasi-linear parabolic equations with variable exponents, a (x, t) ut − ∆m(.)u = fp(.) (u) in which fp(.) (u) the source term, a(x, t) > 0 is a nonnegative function, and the exponents of nonlinearity m(x), p(x ...
RAHMOUNE, Abita   +1 more
core   +1 more source

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