Results 21 to 30 of about 2,548 (123)

Finite and infinite speed of propagation for porous medium equations with fractional pressure [PDF]

open access: yes, 2013
We study a porous medium equation with fractional potential pressure: $$ \partial_t u= \nabla \cdot (u^{m-1} \nabla p), \quad p=(-\Delta)^{-s}u, $$ for $m>1 ...
del Teso, Félix   +2 more
core   +4 more sources

On a Class of Caputo Time Fractional Problems with Boundary Integral Conditions

open access: yesMoroccan Journal of Pure and Applied Analysis, 2021
The aim of this paper is to work out the solvability of a class of Caputo time fractional problems with boundary integral conditions. A generalized formula of integration is demonstrated and applied to establish the a priori estimate of the solution ...
Aggoun Karim, Merad Ahcene
doaj   +1 more source

All functions are locally $s$-harmonic up to a small error [PDF]

open access: yes, 2014
We show that we can approximate every function $f\in C^{k}(\bar{B_1})$ with a $s$-harmonic function in $B_1$ that vanishes outside a compact set. That is, $s$-harmonic functions are dense in $C^{k}_{\rm{loc}}$.
Dipierro, Serena   +2 more
core   +4 more sources

Two equivalent Stefan's problems for the Time Fractional Diffusion Equation [PDF]

open access: yes, 2013
Two Stefan's problems for the diffusion fractional equation are solved, where the fractional derivative of order $ \al \in (0,1) $ is taken in the Caputo's sense.
Marcus, Eduardo A. Santillan   +1 more
core   +2 more sources

Embedding (3 + 1)-dimensional diffusion, telegraph, and Burgers’ equations into fractal 2D and 3D spaces: An analytical study

open access: yesJournal of King Saud University: Science, 2020
Fractional derivatives can be utilized as a promising tool for characterizing systems with embedded memory or describing viscoelasticity of advanced materials.
Marwan Alquran   +2 more
doaj  

Fractional natural decomposition method for solving a certain class of nonlinear time-fractional wave-like equations with variable coefficients

open access: yesActa Universitatis Sapientiae: Mathematica, 2019
In this paper, we propose a new approximate method, namely fractional natural decomposition method (FNDM) in order to solve a certain class of nonlinear time-fractional wave-like equations with variable coefficients.
Khalouta Ali, Kadem Abdelouahab
doaj   +1 more source

On Cauchy problem for pseudo-parabolic equation with Caputo-Fabrizio operator

open access: yesDemonstratio Mathematica, 2023
In this article, we considered the pseudo-parabolic equation with Caputo-Fabrizio fractional derivative. This equation has many applications in different fields, such as science, technology, and so on.
Nghia Bui Dai   +2 more
doaj   +1 more source

Regularity and Bernstein-type results for nonlocal minimal surfaces [PDF]

open access: yes, 2013
We prove that, in every dimension, Lipschitz nonlocal minimal surfaces are smooth. Also, we extend to the nonlocal setting a famous theorem of De Giorgi stating that the validity of Bernstein's theorem in dimension $n+1$ is a consequence of the ...
Figalli, Alessio, Valdinoci, Enrico
core   +4 more sources

A preconditioned iterative method for coupled fractional partial differential equation in European option pricing

open access: yesOpen Mathematics, 2023
Recently, regime-switching option pricing based on fractional diffusion models has been used, which explains many significant empirical facts about financial markets better.
Wu Shuang   +3 more
doaj   +1 more source

Non-local gradients in bounded domains motivated by continuum mechanics: Fundamental theorem of calculus and embeddings

open access: yesAdvances in Nonlinear Analysis, 2023
In this article, we develop a new set of results based on a non-local gradient jointly inspired by the Riesz ss-fractional gradient and peridynamics, in the sense that its integration domain depends on a ball of radius δ>0\delta \gt 0 (horizon of ...
Bellido José Carlos   +2 more
doaj   +1 more source

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