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We prove the intrinsic Harnack's inequality for a general form of a parabolic equation that generalizes both the standard parabolic $p$-Laplace equation and the normalized version arising from stochastic game theory. We prove each result…

Analysis of PDEs · Mathematics 2025-06-23 Tapio Kurkinen , Jarkko Siltakoski

We want to prove a Harnack type inequality for solutions of strongly degenerate parabolic, or elliptic-parabolic, equations. To do that, we first define a De Giorgi class of order $p = 2$ that contains the solutions of evolution equations…

Analysis of PDEs · Mathematics 2025-11-21 Fabio Paronetto

In the case $q> p\dfrac{n+2}{n}$, we give a proof of the weak Harnack inequality for non-negative super-solutions of degenerate double-phase parabolic equations under the additional assumption that $u\in L^{s}_{loc}(\Omega_{T})$ with some…

Analysis of PDEs · Mathematics 2024-02-01 Mariia Savchenko , Igor Skrypnik , Yevgeniia Yevgenieva

We prove Harnack's type inequalities for bounded non-negative solutions of degenerate parabolic equations with $(p,q)$ growth $$ u_{t}-{\rm div}\left(\mid \nabla u \mid^{p-2}\nabla u + a(x,t) \mid \nabla u \mid^{q-2}\nabla u \right)=0,\quad…

Analysis of PDEs · Mathematics 2023-04-12 Mariia Savchenko , Igor Skrypnik , Yevgeniia Yevgenieva

In this paper we give both an historical and technical overview of the theory of Harnack inequalities for nonlinear parabolic equations in divergence form. We start reviewing the elliptic case with some of its variants and geometrical…

Analysis of PDEs · Mathematics 2019-01-31 F. G. Düzgün , S. Mosconi , V. Vespri

We establish weak Harnack inequalities for positive, weak supersolutions to certain doubly degenerate parabolic equations. The prototype of this kind of equations is $$\partial_tu-\operatorname{div}|u|^{m-1}|Du|^{p-2}Du=0,\quad p>2,\quad…

Analysis of PDEs · Mathematics 2017-11-02 Qifan Li

We establish Harnack inequalities for viscosity solutions of a class of degenerate fully nonlinear anisotropic elliptic equations exhibiting non-standard growth conditions. A primary example of such operators is the degenerate anisotropic…

Analysis of PDEs · Mathematics 2026-04-10 Sun-Sig Byun , Hongsoo Kim

In this paper we continue the study on intrinsic Harnack inequality for non- homogeneous parabolic equations in non-divergence form initiated by the first author in [1]. We establish a forward-in-time intrinsic Harnack inequality, which in…

Analysis of PDEs · Mathematics 2024-05-07 Vedansh Arya , Vesa Julin

In this paper, we establish the Harnack inequality of nonnegative weak solutions to the doubly nonlinear mixed local and nonlocal parabolic equations. This result is obtained by combining a related comparison principle, a local boundedness…

Analysis of PDEs · Mathematics 2024-06-07 Vicentiu Radulescu , Bin Shang , Chao Zhang

For a general class of divergence type quasi-linear degenerate parabolic equations with measurable coeffcients and lower order terms from non-linear Kato-type classes, we prove local boundedness and continuity of solutions, and the…

Analysis of PDEs · Mathematics 2009-08-04 Vitali Liskevich , Igor I. Skrypnik

The main result of this paper is a nonlocal version of Harnack's inequality for a class of parabolic nonlocal equations. We additionally establish a weak Harnack inequality as well as local boundedness of solutions. None of the results…

Analysis of PDEs · Mathematics 2018-02-22 Martin Strömqvist

We show that weak solutions to parabolic equations in divergence form with zero Dirichlet boundary conditions are continuously differentiable up to the boundary when the leading coefficients have Dini mean oscillation and the lower order…

Analysis of PDEs · Mathematics 2022-01-13 Hongjie Dong , Luis Escauriaza , Seick Kim

We consider viscosity solutions to nonlinear uniformly parabolic equations in nondivergence form on a Riemannian manifold $M$, with the sectional curvature bounded from below by $-\kappa$ for $\kappa\geq 0$. In the elliptic case, Wang and…

Analysis of PDEs · Mathematics 2014-05-14 Soojung Kim , Ki-Ahm Lee

The weak Harnack inequality for $L^p$-viscosity supersolutions of fully nonlinear second-order uniformly parabolic partial differential equations with unbounded coefficients and inhomogeneous terms is proved. It is shown that H\"older…

Analysis of PDEs · Mathematics 2019-04-02 Shigeaki Koike , Andrzej Swiech , Shota Tateyama

In this paper, we establish a scale invariant Harnack inequality for some inhomogeneous parabolic equations in a suitable intrinsic geometry dictated by the nonlinearity. The class of equations that we consider correspond to the parabolic…

Analysis of PDEs · Mathematics 2021-11-19 Vedansh Arya

We prove Aleksandrov-Bakelman-Pucci estimates and Harnack inequalities for viscosity solutions of a class of degenerate fully nonlinear pseudo-$p$-Laplacian equations in nondivergence form. Our main approach is an adaptation of the sliding…

Analysis of PDEs · Mathematics 2026-02-05 Sun-Sig Byun , Hongsoo Kim

In this paper, we consider the regularity theory for fully nonlinear parabolic integro-differential equations with symmetric kernels. We are able to find parabolic versions of Alexandrov-Backelman-Pucci estimate with 0<\sigma<2. And we show…

Analysis of PDEs · Mathematics 2011-10-14 Yong-Cheol Kim , Ki-Ahm Lee

In this paper we study the local regularity properties of weak solutions to a special class of anisotropic doubly nonlinear parabolic operators, whose prototype is the anisotropic Trudinger's equation $$ u_t- \sum\limits_{i=1}^N…

Analysis of PDEs · Mathematics 2025-07-22 Simone Ciani , Eurica Henriques , Mariia O. Savchenko , Igor I. Skrypnik

We prove an elliptic Harnack's inequality for a general form of a parabolic equation that generalizes both the standard parabolic $p$-Laplace equation and the normalized version that has been proposed in stochastic game theory. This version…

Analysis of PDEs · Mathematics 2024-04-19 Tapio Kurkinen , Mikko Parviainen , Jarkko Siltakoski

This paper studies a class of linear parabolic equations in non-divergence form in which the leading coefficients are measurable and they can be singular or degenerate as a weight belonging to the $A_{1+\frac{1}{n}}$ class of Muckenhoupt…

Analysis of PDEs · Mathematics 2024-10-11 Sungwon Cho , Junyuan Fang , Tuoc Phan
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