Results 21 to 30 of about 11,196 (309)

Positive solutions for a system of Riemann-Liouville fractional differential equations with multi-point fractional boundary conditions

Boundary Value Problems, 2017
We study the existence and nonexistence of positive solutions for a system of nonlinear Riemann-Liouville fractional differential equations subject to multi-point boundary conditions which contain fractional derivatives.
Rodica Luca
doaj   +1 more source

Nonexistence of Global Solutions to Time-Fractional Damped Wave Inequalities in Bounded Domains with a Singular Potential on the Boundary

Fractal and Fractional, 2021
We first consider the damped wave inequality ∂2u∂t2−∂2u∂x2+∂u∂t≥xσ|u|p,t>0,x∈(0,L), where L>0, σ∈R, and p>1, under the Dirichlet boundary conditions (u(t,0),u(t,L))=(f(t),g(t)),t>0.
Areej Bin Sultan, Mohamed Jleli, Bessem Samet   +2 more
doaj   +1 more source

On Global Solutions to a ψ-Caputo Fractional Inequality

Fractal and Fractional
This paper investigates the absence of globally defined, non-trivial solutions for some fractional differential inequalities of the ψ-Caputo type, with polynomial sources involving fractional derivatives.
Mohammed D. Kassim
doaj   +1 more source

Nonexistence of invariant measures [PDF]

Proceedings of the American Mathematical Society, 1983
Let G G be a group acting on a set
openaire   +1 more source

Existence and Nonexistence of Descriptive Patterns [PDF]

Theoretical Computer Science, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dominik D. Freydenberger, Daniel Reidenbach   +1 more
openaire   +1 more source

On the nonexistence of stationary solutions in bio-inspired collective decision making via mean-field game

, 2017
Conditions for nonexistence of stationary solutions in collective decision making are investigated via discrete-state continuous-time mean-field games. The study builds on a bio-inspired model in honeybee swarms.
Stella, L.; id_orcid, Leonardo Stella, Dario Bauso, Bauso, Dario, Stella, Leonardo, Bauso, D.   +5 more
core   +1 more source

On the Nonexistence of k-reptile Tetrahedra [PDF]

Discrete & Computational Geometry, 2011
A d-dimensional simplex S is called a k-reptile if it can be tiled without overlaps by simplices S_1,S_2,...,S_k that are all congruent and similar to S. For d=2, k-reptile simplices (triangles) exist for many values of k and they have been completely characterized by Snover, Waiveris, and Williams.
Jirí Matousek 0001, Zuzana Safernová
openaire   +3 more sources

Nonexistence Results for Higher Order Fractional Differential Inequalities with Nonlinearities Involving Caputo Fractional Derivative

Mathematics, 2021
Higher order fractional differential equations are important tools to deal with precise models of materials with hereditary and memory effects. Moreover, fractional differential inequalities are useful to establish the properties of solutions of ...
Mohamed Jleli, Bessem Samet, Calogero Vetro   +2 more
doaj   +1 more source

Nonexistence of solutions of some inequalities with gradient nonlinearities and fractional Laplacian [PDF]

, 2017
summary:We obtain sufficient conditions for nonexistence of nontrivial solutions for some classes of nonlinear partial differential inequalities containing the fractional powers of the Laplace ...
Galakhov, Evgeny, Salieva, Olga
core   +1 more source

Nonexistence theorems for traversable wormholes

, 2015
Gauss-Bonnet formula is used to derive a new and simple theorem of nonexistence of vacuum static nonsingular Lorentzian wormholes. We also derive simple proofs for the nonexistence of Lorentzian wormhole solutions for some classes of static matter such ...
Saa, A
core   +1 more source