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This paper is concerned with the application of time domain boundary integral methods(TDBIMs) to a non-stationary boundary value problem for the thermo-elasto-dynamic equations, based on the Lubich approach via the Laplace transform.…

Numerical Analysis · Mathematics 2021-05-28 George Hsiao , Tonatiuh Sánchez-Vizuet

We derive a matrix version of Li \& Yau--type estimates for positive solutions of semilinear heat equations on Riemannian manifolds with nonnegative sectional curvatures and parallel Ricci tensor, similarly to what R.~Hamilton did…

Analysis of PDEs · Mathematics 2021-07-30 Giacomo Ascione , Daniele Castorina , Giovanni Catino , Carlo Mantegazza

We study partial data inverse problems for linear and nonlinear parabolic equations with unknown time-dependent coefficients. In particular, we prove uniqueness results for partial data inverse problems for semilinear reaction-diffusion…

Analysis of PDEs · Mathematics 2024-06-04 Ali Feizmohammadi , Yavar Kian , Gunther Uhlmann

The formulation of gauge theories on compact Riemannian manifolds with boundary leads to partial differential operators with Gilkey--Smith boundary conditions, whose peculiar property is the occurrence of both normal and tangential…

Mathematical Physics · Physics 2011-04-15 Ivan G. Avramidi , Giampiero Esposito

We study new invariants of elliptic partial differential operators acting on sections of a vector bundle over a closed Riemannian manifold that we call the relativistic heat trace and the quantum heat traces. We obtain some reduction…

Mathematical Physics · Physics 2017-02-28 Ivan G Avramidi

This paper examines the Laplace equation with mixed boundary conditions, the Neumann and Steklov boundary conditions. This models a container with holes in it, like a pond filled with water but partly covered by immovable pieces on the…

Mathematical Physics · Physics 2020-02-19 Habib Ammari , Kthim Imeri , Nilima Nigam

Let $P$ be an operator of Dirac type and let $D=P^2$ be the associated operator of Laplace type. We impose spectral boundary conditions and study the leading heat content coefficients for $D$.

Mathematical Physics · Physics 2009-11-10 P. Gilkey , K. Kirsten , JH. Park

$\delta'$-function perturbations and Neumann boundary conditions are incorporated into the path integral formalism. The starting point is the consideration of the path integral representation for the one dimensional Dirac particle together…

High Energy Physics - Theory · Physics 2009-10-28 Christian Grosche

Let (M,g) be a compact Riemannian manifold without boundary. Let D be a compact subdomain of M with smooth boundary. We examine the heat content asymptotics for the heat flow from D into M where both the initial temperature and the specific…

Analysis of PDEs · Mathematics 2014-01-27 M. van den Berg , P. Gilkey

In this paper, we study fully nonlinear second-order elliptic and parabolic equations with Neumann boundary conditions on compact Riemannian manifolds with smooth boundary. We derive oscillation bounds for admissible solutions with Neumann…

Analysis of PDEs · Mathematics 2020-01-06 Sheng Guo

The aim of this paper is to develop stable and accurate numerical schemes for boundary integral formulations of the heat equation with Dirichlet boundary conditions. The accuracy of Galerkin discretisations for the resulting boundary…

Numerical Analysis · Mathematics 2018-05-01 Alexey Chernov , Anne Reinarz

We derive large time upper bounds for heat kernels on vector bundles of differential forms on a class of non-compact Riemannian manifolds under certain curvature conditions.

Differential Geometry · Mathematics 2007-05-23 Thierry Coulhon , Qi S. Zhang

The existence of a full asymptotic expansion for the heat content asymptotics of an operator of Laplace type with classical Zaremba boundary conditions on a smooth manifold is established. The first three coefficients in this asymptotic…

Mathematical Physics · Physics 2008-11-26 M. van den Berg , P. Gilkey , K. Kirsten , V. A. Kozlov

We give a short proof of a strong version of the short time asymptotic expansion of heat kernels associated to Laplace type operators acting on sections of vector bundles over compact Riemannian manifolds, including exponential decay of the…

Differential Geometry · Mathematics 2022-01-19 Matthias Ludewig

We give explicit integral formulas for the solutions of planar conjugate conductivity equations in a circular domain of the right half-plane with conductivity $\sigma(x,y)=x^p$, $p\in\mathbb{Z}$. The representations are obtained via a…

Complex Variables · Mathematics 2015-04-30 Slah Chaabi , Stéphane Rigat , Franck Wielonsky

In this paper we consider the Laplace operator with Dirichlet boundary conditions on a smooth domain. We prove that it has a bounded $H^\infty$-calculus on weighted $L^p$-spaces for power weights which fall outside the classical class of…

Analysis of PDEs · Mathematics 2020-04-10 Nick Lindemulder , Mark Veraar

Laplace operators perturbed by meromorphic potential on the Riemann and separated type Klein surfaces are constructed and their indices are calculated by two different ways. The topological expressions for the indices are obtained from the…

High Energy Physics - Theory · Physics 2008-02-03 N. V. Borisov , Kirill Ilinski , Gleb Kalinin

We consider the heat-kernel on a manifold whose boundary is piecewise smooth. The set of independent geometrical quantities required to construct an expression for the contribution of the boundary discontinuities to the C_{2} heat-kernel…

High Energy Physics - Theory · Physics 2009-10-30 J. S. Apps , J. S. Dowker

Given only a collection of points sampled from a Riemannian manifold embedded in a Euclidean space, in this paper we propose a new method to solve elliptic partial differential equations (PDEs) supplemented with boundary conditions. Notice…

Numerical Analysis · Mathematics 2022-11-29 Ryan Vaughn , Tyrus Berry , Harbir Antil

This paper deals with the homogenization of a mixed boundary value problem for the Laplace operator in a domain with locally periodic oscillating boundary. The Neumann condition is prescribed on the oscillating part of the boundary, and the…

Analysis of PDEs · Mathematics 2021-02-22 Srinivasan Aiyappan , Klas Pettersson