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The present work is devoted to the study of a boundary value problem for second order linear differential equation set on singular cylindrical domain. This problem can be regarded via a natural change of variables as an elliptic abstract…

Functional Analysis · Mathematics 2018-09-10 Belkacem Chaouchi , Marko Kostic

We formulate the notion of continuous evolution algebra in terms of differentiable matrix-valued functions, to then study those such algebras arising as solutions of ODE problems. Given their dependence on natural bases, matrix Lie groups…

Rings and Algebras · Mathematics 2022-02-08 Fernando Montaner , Irene Paniello

We develop a rigorous formalism for the description of the evolution of observables in quantum systems of particles. We construct a solution of the initial-value problem to the quantum dual BBGKY hierarchy of equations as an expansion over…

Mathematical Physics · Physics 2011-01-21 G. Borgioli , V. Gerasimenko

This is the first part of a series devoting to the generalizations and applications of common theorems in variational bifurcation theory. Using parameterized versions of splitting theorems in Morse theory we generalize some famous…

Dynamical Systems · Mathematics 2021-11-17 Guangcun Lu

We present an introduction to boundary value problems for Dirac-type operators on complete Riemannian manifolds with compact boundary. We introduce a very general class of boundary conditions which contains local elliptic boundary…

Differential Geometry · Mathematics 2024-10-02 Christian Baer , Werner Ballmann

This paper is concerned with initial-boundary-value problems (IBVPs) for a class of nonlinear Schr\"odinger equations posed either on a half line $\mathbb{R}^+$ or on a bounded interval $(0, L)$ with nonhomogeneous boundary conditions. For…

Analysis of PDEs · Mathematics 2016-11-23 Jerry L. Bona , Shu-Ming Sun , Bing-Yu Zhang

We consider first-order elliptic differential operators acting on vector bundles over smooth manifolds with smooth boundary, which is permitted to be noncompact. Under very mild assumptions, we obtain a regularity theory for sections in the…

Differential Geometry · Mathematics 2026-02-12 Christian Baer , Lashi Bandara

We present a novel analysis of the boundary integral operators associated to the wave equation. The analysis is done entirely in the time-domain by employing tools from abstract evolution equations in Hilbert spaces and semi-group theory.…

Numerical Analysis · Mathematics 2018-04-23 Matthew Hassell , Tianyu Qiu , Tonatiuh Sanchez-Vizuet , Francisco-Javier Sayas

We consider the inhomogeneous Mixed-boundary value problem for the cubic nonlinear Schr\"{o}dinger equations on the half line. We present sufficient conditions of initial and boundary data which ensure asymptotic behavior of small solutions…

Analysis of PDEs · Mathematics 2019-10-31 Liliana Esquivel , Elena Kaikina , Nakao Hayashi

We study the rate of convergence for (variational) eigenvalues of several non-linear problems involving oscillating weights and subject to different kinds of boundary conditions in bounded domains.

Analysis of PDEs · Mathematics 2012-08-29 Julian Fernandez Bonder , Juan P. Pinasco , Ariel M. Salort

We study the homogeneous involutions on the full square matrices over an algebraically closed field endowed with a division grading with commutative support. We obtain the classification of the isomorphism and equivalence classes for the…

Rings and Algebras · Mathematics 2026-01-30 Micael Said Garcia , Cassia Ferreira Sampaio

The linear PDE ${\mathbf B} {\mathbf L} (\frac{\partial}{\partial x}) u ={\mathbf L}_1(\frac{\partial}{\partial x})u +f(x)$ with nonclassic conditions on boundary $\partial \Omega$ is considered. Here ${\mathbf B}$ is linear noninvertible…

Analysis of PDEs · Mathematics 2016-10-11 Nikolai Sidorov , Denis Sidorov

The paper presents a first step towards a family index theorem for classical self-adjoint boundary value problems. We address here the simplest non-trivial case of manifolds with boundary, namely the case of two-dimensional manifolds. The…

Mathematical Physics · Physics 2023-02-01 Marina Prokhorova

In a configuration space whose boundary can be identified with a subset of its interior, a boundary condition can relate the behaviour of a function on the boundary and in the interior. Additionally, boundary values can appear as additive…

Spectral Theory · Mathematics 2025-06-19 Tim Binz , Jonas Lampart

In this note we develop a framework which allows to prove an abstract existence result for non-linear evolution equations involving so-called non-induced operators, i.e., operators which are not prescribed by a time-dependent family of…

Analysis of PDEs · Mathematics 2019-12-24 Alex Kaltenbach

In this paper we consider traces at initial times for functions with mixed time-space smoothness. Such results are often needed in the theory of evolution equations. Our result extends and unifies many previous results. Our main improvement…

Analysis of PDEs · Mathematics 2022-05-17 Antonio Agresti , Nick Lindemulder , Mark Veraar

A large class of initial-boundary value problems of linear evolution partial differential equations formulated on the half-line is analyzed via the unified transform method. In particular, explicit formulae are presented for the generalized…

Analysis of PDEs · Mathematics 2016-04-21 Athanassios S. Fokas , Zipeng Wang

In this paper we describe an iterative operator-splitting method for unbounded operators. We derive error bounds for iterative splitting methods in the presence of unbounded operators and semigroup operators. Here mixed applications of…

Numerical Analysis · Mathematics 2009-04-02 Juergen Geiser

The concept of boundary values of holomorphic semigroups in a general Banach space is studied. As an application, we consider the Riemann-Liouville semigroup of integration operator in the little H\"older spaces $\rm{lip}_0^\alpha[0,\, 1] ,…

Functional Analysis · Mathematics 2019-04-09 Omar EL-Mennaoui , Valentin Keyantuo , Ahmed Sani

In this paper, we consider a new kind of evolution multivalued quasi-variational inequalities with feedback effect and a nonlinear bifunction which contain several (evolution) quasi-variational/hemivariational inequalities as special cases.…

Functional Analysis · Mathematics 2024-05-29 Shengda Zeng , Vicenţiu D. Rădulescu