Results 21 to 30 of about 14,319 (293)

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

open access: yesBoundary 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

A Perturbed Cauchy Viscoelastic Problem in an Exterior Domain

open access: yesMathematics, 2023
A Cauchy viscoelastic problem perturbed by an inverse-square potential, and posed in an exterior domain of RN, is considered under a Dirichlet boundary condition.
Bessem Samet, Calogero Vetro
doaj   +1 more source

Nonexistence of invariant measures [PDF]

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

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

open access: yes, 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

On Global Solutions to a ψ-Caputo Fractional Inequality

open access: yesFractal 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

A Time-Fractional Differential Inequality of Sobolev Type on an Annulus

open access: yesAxioms, 2023
Several phenomena from natural sciences can be described by partial differential equations of Sobolev-type. On the other hand, it was shown that in many cases, the use of fractional derivatives provides a more realistic model than the use of standard ...
Amal Alshabanat   +3 more
doaj   +1 more source

Existence and Nonexistence of Descriptive Patterns [PDF]

open access: yesTheoretical Computer Science, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dominik D. Freydenberger   +1 more
openaire   +3 more sources

On the Nonexistence of k-reptile Tetrahedra [PDF]

open access: yesDiscrete & 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   +4 more sources

Nonexistence of Positive Solutions for Quasilinear Equations with Decaying Potentials

open access: yesMathematics, 2020
In this paper, we consider a quasilinear Schrödinger equation, which arises from the study of the superfluid film equation in plasma physics. Our main goal is to find the growth condition for nonlinear term and decaying condition for the potential ...
Ohsang Kwon
doaj   +1 more source

Dual Single Atoms Boosting Photocatalytic Upcycling of Raw Polyvinylidene Fluoride Plastic

open access: yesAdvanced Materials, EarlyView.
To resolve the catastrophic disaster of plastic contamination, the Cu‐Fe dual‐single‐atom‐loaded In2P3S9 NSs photocatalyst was prepared for direct conversion of raw polyvinylidene fluoride plastic into valuable chemicals. The dual‐single‐atom catalyst exhibits exceptional performance, with a total acetic/formic acid production of ∼1351.8 µmol g−1 ...
Amin Talebian‐Kiakalaieh   +6 more
wiley   +1 more source

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