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19952026
most citedThe virtual crystal approximation revisited: Application to dielectric and piezoelectric properties of perovskites

912 citations

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25 papers · 1 filter

math.CV2025★ 5 cited

Bicomplex Hardy Classes of Solutions to Higher-Order Vekua Equations

William L. Blair

We extend representation formulas for functions in Hardy classes of solutions to higher-order iterated Vekua equations to Hardy classes of bicomplex-valued functions that solve a b…

math.CV2024

The -problem on -domains

Debraj Chakrabarti, Phillip S. Harrington, Andrew Raich

Given a complex manifold containing a relatively compact domain, we give sufficient geometric conditions on the domain so that its -cohomology in degree (known…

math.CV2023★ 5 cited

The Schwarz boundary value problem for boundary values in the sense of distributions

William L. Blair

We construct solutions to the Schwarz boundary value problem on the unit disk and the upper half-plane when the boundary condition is with respect to boundary values in the sense o…

math.CV2023★ 7 cited

An atomic representation for Hardy classes of solutions to nonhomogeneous Cauchy-Riemann equations

William L. Blair

We develop a representation of the second kind for certain Hardy classes of solutions to nonhomogeneous Cauchy-Riemann equations and use it to show that boundary values in the sens…

math.CV2020★ 11 cited

Optimal approximants and orthogonal polynomials in several variables

Meredith Sargent, Alan Sola

We discuss the notion of optimal polynomial approximants in multivariable reproducing kernel Hilbert spaces. In particular, we analyze difficulties that arise in the multivariable…

math.CV2019★ 2 cited

The -Neumann operator with the Sobolev norm of integer orders

Phillip Harrington, Bingyuan Liu

Let be a bounded pseudoconvex domain with smooth boundary. For each , we give a sufficient condition to estimate the -Neumann o…

math.CV2018

Hartogs Domains and the Diederich Fornæss Index

Muhenned Abdulsahib, Phillip S. Harrington

We study a geometric property of the boundary on Hartogs domains which can be used to find upper and lower bounds for the Diederich-Fornæss Index. Using this, we are able to show t…

math.CV2018

Interpolation and sampling sequences for mixed-norm spaces

Phuc K. Nguyen, Daniel H. Luecking

This paper extends the known characterization of interpolation and sampling sequences for Bergman spaces to the mixed-norm spaces. The Bergman spaces have conformal invariance prop…

math.CV2016

Some Properties of the Higher Spin Laplace Operator

Chao Ding, John Ryan

The higher spin Laplace operator has been constructed recently as the generalization of the Laplacian in higher spin theory. This acts on functions taking values in arbitrary irred…

math.CV2016

Zero sets of functions in the Nevanlinna class and the -equation on convex domains of general type in

Tran Vu Khanh, Andrew Raich

The purpose of this paper is to characterize the zero sets of holomorphic functions in the Nevanlinna class on a class of convex domains of infinite type in . Moreove…

math.CV2015★ 3 cited

On Some Conformally Invariant Operators in Euclidean Space

Chao Ding, John Ryan

The aim of this paper is to correct a mistake in earlier work on the conformal invariance of Rarita-Schwinger operators and use the method of correction to develop properties of so…

math.CV2014★ 3 cited

The Szegö kernel on a class of noncompact CR manifolds of high codimension

Andrew Raich, Michael Tinker

We generalize Nagel's formula for the Szegö kernel and use it to compute the Szegö kernel on a class of noncompact CR manifolds whose tangent space decomposes into one complex dire…

math.CV2014★ 4 cited

Local regularity of the Bergman projection on a class of pseudoconvex domains of finite type

Tran Vu Khanh, Andrew Raich

The purpose of this paper is to prove that if a pseudoconvex domains satisfies Bell-Ligocka's Condition R and admits a ``good" dilation, then the Bergman pro…

math.CV2013★ 31 cited

Cauchy-type integrals in several complex variables

Loredana Lanzani, Elias M. Stein

We present the theory of Cauchy-Fantappié integral operators, with emphasis on the situation when the domain of integration, , has minimal boundary regularity. Among these opera…

math.CV2012★ 2 cited

The Kerzman-Stein operator for piecewise continuously differentiable regions

Michael Bolt, Andrew Raich

The Kerzman-Stein operator is the skew-hermitian part of the Cauchy operator defined with respect to an unweighted hermitian inner product on a rectifiable curve. If the curve is c…

math.CV2011★ 1 cited

Some Operators Associated to Rarita-Schwinger Type Operators

Junxia Li, John Ryan

In this paper we study some operators associated to the Rarita-Schwinger operators. They arise from the difference between the Dirac operator and the Rarita-Schwinger operators. Th…

math.CV2010

Heat Kernels, Smoothness Estimates and Exponential Decay

Albert Boggess, Andrew Raich

In this article, we establish Gaussian decay for the Box_b-heat kernel on polynomial models in C^2. Our technique attains the exponential decay via a partial Fourier transform. On…

math.CV2009

Regularity results for on CR-manifolds of hypersurface type

Phillip Harrington, Andrew Raich

We introduce a class of embedded CR manifolds satisfying a geometric condition that we call weak . For such manifolds, we show that dbar-b has closed range on and that…

math.CV2008★ 1 cited

Compactness of the Complex Green Operator on CR-Manifolds of Hypersurface Type

Andrew Raich

The purpose of this article is to study compactness of the complex Green operator on CR manifolds of hypersurface type. We introduce (CR-P_q), a potential theoretic condition on $(…

math.CV2008

-Dirac Operators

Craig A. Nolder, John Ryan

We introduce non-linear Dirac operators in associated to the -harmonic equation and we extend to other contexts including spin manifolds and the sphere.

math.CV2005

An isoperimetric inequality for logarithmic capacity of polygons

Alexander Yu. Solynin, Victor A Zalgaller

We verify an old conjecture of G. Polya and G. Szego saying that the regular n-gon minimizes the logarithmic capacity among all n-gons with a fixed area.

math.CV2004★ 1 cited

On the number of zeros of certain rational harmonic functions

Dmitry Khavinson, Genevra Neumann

Extending a result from the paper of D. Khavinson and G. Swiatek, we show that the rational harmonic function , where r(z) is a rational function of degree n > 1, h…

math.CV2003★ 6 cited

Introductory Clifford Analysis

John Ryan

This paper is an elaboration of an introductory talk given by the author at a workshop on Clifford algebras at Tennessee Technical University, in May 2002. We give an introduction…

math.CV1999

Vita: Friedrich Wilhelm Wiener

Harold P. Boas, Dmitry Khavinson

We report on the life and work of F. Wiener, whom we confused with N. Wiener in a previous article.