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We study the $\bar\partial$-Neumann Laplacian from spectral theoretic perspectives. In particular, we show how pseudoconvexity of a bounded domain is characterized by positivity of the $\bar\partial$-Neumann Laplacian.

Complex Variables · Mathematics 2010-06-23 Siqi Fu

Higher regularity estimate has been a challenging question for the Boltzmann equation in bounded domains. Indeed, it is well-known to have "the non-existence of a second order derivative at the boundary" in [15] even for symmetric convex…

Analysis of PDEs · Mathematics 2021-03-29 Hongxu Chen , Chanwoo Kim

This paper provides a connection between two distinct branches of research in CR geometry -- namely, analytic and geometric conditions that suffice to establish the closed range of the Cauchy-Riemann operator and CR invariants on CR…

Complex Variables · Mathematics 2018-05-16 Phillip S. Harrington , Andrew Raich

On a convex bounded Euclidean domain, the ground state for the Laplacian with Neumann boundary conditions is a constant, while the Dirichlet ground state is log-concave. The Robin eigenvalue problem can be considered as interpolating…

Analysis of PDEs · Mathematics 2018-02-21 Ben Andrews , Julie Clutterbuck , Daniel Hauer

We survey results arising from the study of domains in C^n with non-compact automorphism group. Beginning with a well-known characterization of the unit ball, we develop ideas toward a consideration of weakly pseudoconvex (and even…

Complex Variables · Mathematics 2016-09-06 A. V. Isaev , S. G. Krantz

In this paper, we generalize a recent work of Liu et al. from the open unit ball $\mathbb B^n$ to more general bounded strongly pseudoconvex domains with $C^2$ boundary. It turns out that part of the main result in this paper is in some…

Complex Variables · Mathematics 2016-03-22 Xieping Wang , Guangbin Ren

We study nonlinear Neumann type boundary value problems related to ergodic phenomenas. The particularity of these problems is that the ergodic constant appears in the (possibly nonlinear) Neumann boundary conditions. We provide, for bounded…

Analysis of PDEs · Mathematics 2015-06-26 Guy Barles , Francesca Da Lio

It is shown that if the squeezing function tends to one at an h-extendible boundary point of a $\mathcal C^\infty$-smooth, bounded pseudoconvex domain, then the point is strictly pseudoconvex.

Complex Variables · Mathematics 2018-08-14 Nikolai Nikolov

We study a nonlinear elliptic boundary value problem defined on a smooth bounded domain involving the fractional Laplace operator, a concave-convex powers term together with mixed Dirichlet-Neumann boundary conditions.

Analysis of PDEs · Mathematics 2020-09-01 J. Carmona , E. Colorado , T. Leonori , A. Ortega

We present a method for constructing global holomorphic peak functions from local holomorphic support functions for broad classes of unbounded domains. As an application, we establish a method for showing the positivity and completeness of…

Complex Variables · Mathematics 2014-11-12 Taeyong Ahn , Hervé Gaussier , Kang-Tae Kim

For a hyponormal operator, C. R. Putnam's inequality gives an upper bound on the norm of its self-commutator. In the special case of a Toeplitz operator with analytic symbol in the Smirnov space of a domain, there is also a geometric lower…

Functional Analysis · Mathematics 2014-11-13 Steven R. Bell , Timothy Ferguson , Erik Lundberg

We study proper holomorphic mappings between strictly pseudoconvex domains with low boundary regularity.

Complex Variables · Mathematics 2021-08-11 Alexandre Sukhov

We prove nontangential asymptotic limits of the Bergman kernel on the diagonal, and the Bergman metric and its holomorphic sectional curvature at exponentially flat infinite type boundary points of smooth bounded pseudoconvex domains in…

Complex Variables · Mathematics 2023-11-03 Ravi Shankar Jaiswal

We study the regularity of minimizers of a two-phase free boundary problem. For a class of n-dimensional convex domains, we establish the Lipschitz continuity of the minimizer up to the fixed boundary under Neumann boundary conditions. Our…

Analysis of PDEs · Mathematics 2020-04-22 Thomas Beck , David Jerison , Sarah Raynor

New upper bounds on the pointwise behaviour of Christoffel function on convex domains in ${\mathbb{R}}^d$ are obtained. These estimates are established by explicitly constructing the corresponding "needle"-like algebraic polynomials having…

Classical Analysis and ODEs · Mathematics 2017-07-26 A. Prymak

By considering a certain univalent function in the open unit disk U, that maps U onto a strip domain, we introduce a new class of analytic and close-to-convex functions by means of a certain non-homogeneous Cauchy-Euler-type differential…

Complex Variables · Mathematics 2019-02-19 Serap Bulut

Consider a bounded, strongly pseudoconvex domain $D\subset \mathbb C^n$ with minimal smoothness (namely, the class $C^2$) and let $b$ be a locally integrable function on $D$. We characterize boundedness (resp., compactness) in $L^p(D), p >…

Complex Variables · Mathematics 2023-11-28 Bingyang Hu , Zhenghui Huo , Loredana Lanzani , Kevin Palencia , Nathan A. Wagner

We present some old and new results on a class of invariant spaces of holomorphic functions on symmetric domains, both in their circular bounded realizations and in their unbounded realizations as Siegel domains of type II. These spaces…

Complex Variables · Mathematics 2026-04-21 Mattia Calzi

It is shown that any non-degenerate $\mathbb C$-convex domain in $\mathbb C^n$ is uniformly squeezing. It is also found the precise behavior of the squeezing function near a Dini-smooth boundary point of a plane domain.

Complex Variables · Mathematics 2018-08-14 Nikolai Nikolov , Lyubomir Andreev

Let $M$ be a complex manifold with boundary $X$, which admits a holomorphic Lie group $G$-action preserving $X$. We establish a full asymptotic expansion for the $G$-invariant Bergman kernel under certain assumptions. As an application, we…

Complex Variables · Mathematics 2024-04-25 Chin-Yu Hsiao , Rung-Tzung Huang , Xiaoshan Li , Guokuan Shao