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We give a sufficient condition for H\"older continuity at a boundary point for quasiminima of double-phase functionals of $p,q$-Laplace type, in the setting of metric measure spaces equipped with a doubling measure and supporting a…

Analysis of PDEs · Mathematics 2025-07-25 Antonella Nastasi , Cintia Pacchiano Camacho

We study the elliptic equation with a line Dirac delta function as the source term subject to the Dirichlet boundary condition in a two-dimensional domain. Such a line Dirac measure causes different types of solution singularities in the…

Numerical Analysis · Mathematics 2021-03-16 Hengguang Li , Xiang Wan , Peimeng Yin , Lewei Zhao

In this article we introduce a natural extension of the well-studied equation for harmonic maps between Riemannian manifolds by assuming that the target manifold is equipped with a connection that is metric but has non-vanishing torsion.…

Differential Geometry · Mathematics 2021-07-05 Volker Branding

In this paper we obtain symmetry and monotonicity results for positive solutions to some $p$-Laplacian cooperative systems in bounded domains involving first order terms and under zero Dirichlet boundary condition.

Analysis of PDEs · Mathematics 2020-02-28 Francesco Esposito , Susana Merchán , Luigi Montoro

We prove the maximal local regularity of weak solutions to the parabolic problem associated with the fractional Laplacian with homogeneous Dirichlet boundary conditions on an arbitrary bounded open set $\Omega\subset\mathbb{R}^N$. Proofs…

Analysis of PDEs · Mathematics 2017-05-23 Umberto Biccari , Mahamadi Warma , Enrique Zuazua

This paper establishes connections between the boundary behaviour of functions representable as absolutely convergent Dirichlet series in a half-plane and the convergence properties of partial sums of the Dirichlet series on the boundary.…

Complex Variables · Mathematics 2018-05-16 Stephen J. Gardiner , Myrto Manolaki

In this paper, we shall study the boundary case for complex Monge-Amp\`ere type equations under certain geometric assumptions.

Analysis of PDEs · Mathematics 2023-05-05 Wei Sun

We formulate and prove an analog of the classical Morse-Darboux lemma for the case of a surface with boundary.

Symplectic Geometry · Mathematics 2018-10-16 I. Kirillov

We establish sharp global regularity results for solutions to nonhomogeneous, nonunifomrly elliptic systems with zero boundary conditions. In particular, we obtain everywhere Lipschitz continuity under borderline Lorentz assumptions on the…

Analysis of PDEs · Mathematics 2022-07-01 Cristiana De Filippis , Mirco Piccinini

In this note we prove a new symmetrization result, in the form of mass concentration comparison, for solutions of nonlocal nonlinear Dirichlet problems involving fractional p Laplacians. Some regularity estimates of solutions will be…

Analysis of PDEs · Mathematics 2022-05-13 Vincenzo Ferone , Bruno Volzone

We develop estimates for the solutions and derive existence and uniqueness results of various local boundary value problems for Dirac equations that improve all relevant results known in the literature. With these estimates at hand, we…

Differential Geometry · Mathematics 2017-07-12 Qun Chen , Jürgen Jost , Linlin Sun , Miaomiao Zhu

We consider the Dirichlet problem for quasilinear elliptic equations with Musielak-Orlicz (p,q)-growth and non-logarithmic conditions on the coefficients. A sufficient Wiener-type condition for the regularity of a boundary point is…

Analysis of PDEs · Mathematics 2021-09-20 Oleksandr V. Hadzhy , Mykhailo V. Voitovych

We prove the homogenization of fully nonlinear parabolic equations with periodic oscillating Dirichlet boundary conditions on certain general prescribed space-time domains. It was proved in [9,10] that for elliptic equations, the…

Analysis of PDEs · Mathematics 2022-03-09 Yuming Paul Zhang

Some years ago, the harmonic polynomial was introduced in order to understand better the harmonic topological index; for instance, it allows to obtain bounds of the harmonic index of the main products of graphs. Here, we obtain several…

Combinatorics · Mathematics 2023-02-06 Walter Carballosa , Juan E. Nápoles , J. M Rodríguez , Omar Rosario , J. M. Sigarreta

Let $E\subset \mathbb{R}^{n+1}$, $n\ge 1$, be a uniformly rectifiable set of dimension $n$. We show $E$ that has big pieces of boundaries of a class of domains which satisfy a 2-sided corkscrew condition, and whose connected components are…

Classical Analysis and ODEs · Mathematics 2015-05-08 Simon Bortz , Steve Hofmann

In this paper, we consider the pointwise boundary Lipschitz regularity of solutions for the semilinear elliptic equations in divergence form mainly under some weaker assumptions on nonhomogeneous term and the boundary. If the domain…

Analysis of PDEs · Mathematics 2021-05-14 Jingqi Liang , Lihe Wang , Chunqin Zhou

A boundary behavior of mappings, which are closely related with Sobolev and Orlicz--Sobolev classes in the plane and in the space, is investigated. There are obtained theorems on boundary behavior of classes mentioned above.

Complex Variables · Mathematics 2017-01-24 Evgeny Sevost'yanov

A quantitative version of an inequality obtained in \cite[Theorem~2.1]{mathz} is given. More precisely, for normalized $K$ quasiconformal harmonic mappings of the unit disk onto a Jordan domain $\Omega\in C^{1,\mu} $ ($0<\mu\le 1$) we give…

Complex Variables · Mathematics 2012-02-21 David Kalaj

In this note, we characterize the sharp boundary condition such that the fractional harmonic extensions with H\"older regularity up to the boundary is globally H\"older continuous. The proofs are based on estimates of fractional harmonic…

Analysis of PDEs · Mathematics 2025-08-19 Feng Li

In this paper we study upper and lower bounds of the index and the nullity for sequences of harmonic maps with uniformly bounded Dirichlet energy from a two-dimensional Riemann surface into a compact target manifold. The main difficulty…

Differential Geometry · Mathematics 2024-05-17 Jonas Hirsch , Tobias Lamm