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We prove local higher integrability of the gradient of a weak solution to a degenerate parabolic double-phase system. This result comes with a reverse H\"older type estimate for the gradient. The proof is based on estimates in the intrinsic…

Analysis of PDEs · Mathematics 2023-04-20 Wontae Kim , Juha Kinnunen , Kristian Moring

We prove the self-improving property of very weak solutions to non-uniformly elliptic problems of double phase type in divergence form under sharp assumptions on the nonlinearity.

Analysis of PDEs · Mathematics 2023-06-30 Sumiya Baasandorj , Sun-Sig Byun , Wontae Kim

We prove that bounded weak solutions to degenerate parabolic double-phase equations of $p$-Laplace type are locally H\"older continuous. The proof is based on phase analysis and methods for the $p$-Laplace equation. In particular, the phase…

Analysis of PDEs · Mathematics 2025-02-04 Wontae Kim , Kristian Moring , Lauri Särkiö

We prove a local higher integrability result for the gradient of a weak solution to parabolic double-phase systems of $p$-Laplace type when $\tfrac{2n}{n+2}< p\le2$. The result is based on a reverse H\"older inequality in intrinsic…

Analysis of PDEs · Mathematics 2024-02-05 Wontae Kim , Lauri Särkiö

We establish an interior gradient higher integrability result for weak solutions to degenerate parabolic double phase systems involving two modulating coefficients. To be more precise, we study systems of the form \[ u_t-\operatorname{div}…

Analysis of PDEs · Mathematics 2026-04-29 Jehan Oh , Abhrojyoti Sen

In this paper, we establish a quantitative weak unique continuation theorem on an annular domain for a backward degenerate parabolic equation with a degenerate interior point. Our methodology hinges on approximating the solution of the…

Analysis of PDEs · Mathematics 2026-05-05 Dong-Hui Yang , Bao-Zhu Guo , Guojie Zheng , Jie Zhong

We prove that bounded solutions to degenerate parabolic double-phase problem modelled upon \[u_t-\dv(|\na u|^{p-2}\na u+a(x,t)|\na u|^{q-2}\na u)=-\dv(|F|^{p-2}F+a(x,t)|F|^{q-2}F)\,, \] where a nonnegative weight $a$ is $\alpha$-H\"older…

Analysis of PDEs · Mathematics 2025-12-15 Iwona Chlebicka , Prashanta Garain , Wontae Kim

The large time behaviour of nonnegative solutions to a quasilinear degenerate diffusion equation with a source term depending solely on the gradient is investigated. After a suitable rescaling of time, convergence to a unique profile is…

Analysis of PDEs · Mathematics 2012-02-29 Philippe Laurencot , Christian Stinner

This paper is devoted to studying the local behavior of non-negative weak solutions to the doubly non-linear parabolic equation \begin{equation*} \partial_t u^q - \text{div}\big(|D u|^{p-2}D u\big) = 0 \end{equation*} in a space-time…

Analysis of PDEs · Mathematics 2023-05-16 Verena Bögelein , Frank Duzaar , Ugo Gianazza , Naian Liao , Christoph Scheven

We prove global existence of nonnegative weak solutions to a degenerate parabolic system which models the interaction of two thin fluid films in a porous medium. Furthermore, we show that these weak solutions converge at an exponential rate…

Analysis of PDEs · Mathematics 2011-10-31 Joachim Escher , Philippe Laurencot , Bogdan-Vasile Matioc

We establish a local boundedness estimate for weak subsolutions to a doubly nonlinear parabolic fractional $p$-Laplace equation. Our argument relies on energy estimates and a parabolic nonlocal version of De Giorgi's method. Furthermore, by…

Analysis of PDEs · Mathematics 2020-10-13 Agnid Banerjee , Prashanta Garain , Juha Kinnunen

We give a proof of the H\"older continuity of weak solutions of certain degenerate doubly nonlinear parabolic equations in measure spaces. We only assume the measure to be a doubling non-trivial Borel measure which supports a Poincar\'e…

Analysis of PDEs · Mathematics 2015-03-17 Tuomo Kuusi , Juhana Siljander , José Miguel Urbano

A doubly degenerate parabolic equation in non-divergent form with variable growth is investigated in this paper. In suitable spaces, we prove the existence of weak solutions of the equation for cases $1\leq m < 2$ and $m\geq 2$ in different…

Analysis of PDEs · Mathematics 2024-04-24 Jingfeng Shao , Zhichang Guo , Zhongxiang Zhou

We study local regularity for nonlocal doubly degenerate parabolic equations. The model equation is \begin{equation*}\begin{split}…

Analysis of PDEs · Mathematics 2025-09-09 Qifan Li

Bounded weak solutions to a particular class of degenerate parabolic cross-diffusion systems are shown to coincide with the unique strong solution determined by the same initial condition on the maximal existence interval of the latter. The…

Analysis of PDEs · Mathematics 2022-07-04 Philippe Laurençot , Bogdan-Vasile Matioc

This article establishes an interior gradient higher integrability result for weak solutions to parabolic multi-phase problems. The prototype equation for the parabolic multi-phase problem of $p$-Laplace type is given by \[ u_t -…

Analysis of PDEs · Mathematics 2024-11-12 Abhrojyoti Sen

This paper provides a local and global Calder\'on-Zygmund type estimate of a weak solution to the parabolic double-phase system. The proof of local estimate is based on comparison estimates and the scaling invariant property of the…

Analysis of PDEs · Mathematics 2024-06-21 Wontae Kim

This paper proves a local higher integrability result for the spatial gradient of weak solutions to doubly nonlinear parabolic systems. The new feature of the argument is that the intrinsic geometry involves the solution as well as its…

Analysis of PDEs · Mathematics 2024-06-05 Verena Bögelein , Frank Duzaar , Juha Kinnunen , Christoph Scheven

This paper studies H\"older regularity property of bounded weak solutions to a class of strongly coupled degenerate parabolic systems.

Analysis of PDEs · Mathematics 2011-10-13 Dung Le

The aim of this paper is to prove global in time existence of weak solutions for a viscoelastic phase separation. We consider the case with singular potentials and degenerate mobilities. Our model couples the diffusive interface model with…

Analysis of PDEs · Mathematics 2022-08-31 Aaron Brunk , Maria Lukacova-Medvidova
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