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We prove the spectral invariance of the algebra of classical pseudodifferential boundary value problems on manifolds with conical singularities in the Lp-setting. As a consequence we also obtain the spectral invariance of the classical…

Analysis of PDEs · Mathematics 2017-09-21 Pedro T. P. Lopes , Elmar Schrohe

We build a solvability theory of elliptic boundary-value problems in normed Sobolev spaces of generalized smoothness for any integrability exponent $p>1$. The smoothness is given by a number parameter and a supplementary function parameter…

Analysis of PDEs · Mathematics 2025-10-01 Anna Anop , Aleksandr Murach

We study the Fredholm properties of a general class of elliptic differential operators on $\R^n$. These results are expressed in terms of a class of weighted function spaces, which can be locally modeled on a wide variety of standard…

Analysis of PDEs · Mathematics 2007-05-23 Daniel M. Elton

We give necessary and sufficient conditions for the solvability of some semilinear elliptic boundary value problems involving the Laplace operator with linear and nonlinear highest order boundary conditions involving the Laplace-Beltrami…

Analysis of PDEs · Mathematics 2013-11-14 Ciprian G. Gal , Gisele Ruiz Goldstein , Jerome A. Goldstein , Silvia Romanelli , Mahamadi Warma

In a refined Sobolev scale, we investigate an elliptic boundary-value problem with additional unknown functions in boundary conditions for which the maximum of orders of boundary operators is grater than or equal to the order of the…

Analysis of PDEs · Mathematics 2018-04-03 Tetiana Kasirenko , Iryna Chepurukhina

In this paper, an equality between the Hochs-Mathai type index and the Atiyah-Patodi-Singer type index is established when the manifold and the group action are both non-compact, which generalizes a result of Ma and Zhang for compact group…

Differential Geometry · Mathematics 2017-03-10 Xiangsheng Wang

We investigate an arbitrary regular elliptic boundary-value problem given in a bounded Euclidean domain with infinitely smooth boundary. We prove that the operator of the problem is bounded and Fredholm in appropriate pairs of H\"ormander…

Analysis of PDEs · Mathematics 2015-09-15 Anna V. Anop , Aleksandr A. Murach

We introduce a notion of ellipticity of complexes of linear pseudodifferential operators acting on sections of $A$-Hilbert bundles over smooth manifolds, $A$ being a $C^*$-algebra. We prove that the cohomology groups of an $A$-elliptic…

Operator Algebras · Mathematics 2022-08-23 Svatopluk Krýsl

This is a survey of recent results on zeta- and eta-function poles and values for realizations of Laplace- and Dirac-type operators defined by pseudodifferential projection boundary conditions (including the Atiyah-Patodi-Singer operator…

Analysis of PDEs · Mathematics 2007-05-23 Gerd Grubb

We use algebras of pseudodifferential operators on groupoids to study geometric operators on non-compact manifolds and singular spaces. The first step is to establish that the geometric operators are in our algebras. This then leads to…

Spectral Theory · Mathematics 2007-05-23 Robert Lauter , Victor Nistor

We consider the index problem for a wide class of nonlocal elliptic operators on a smooth closed manifold, namely differential operators with shifts induced by the action of an isometric diffeomorphism. The key to the solution is the method…

Analysis of PDEs · Mathematics 2019-01-01 Anton Savin , Elmar Schrohe , Boris Sternin

We prove regularity for a class of boundary value problems for first order elliptic systems, with boundary conditions determined by spectral decompositions, under coefficient differentiability conditions weaker than previously known. We…

Differential Geometry · Mathematics 2007-05-23 P. T. Chrusciel , R. Bartnik

The model problem of a plane angle for a second-order elliptic system subject to Dirichlet, mixed, and Neumann boundary conditions is analyzed. For each boundary condition, the existence of solutions of the form $r^\lambda v$ is reduced to…

Analysis of PDEs · Mathematics 2025-11-26 Michael Tsopanopoulos

We consider special classes of linear bounded operators in Banach spaces and suggest certain operator variant of symbolic calculus. It permits to formulate an index theorem and to describe Fredholm properties of elliptic pseudo-differential…

Functional Analysis · Mathematics 2019-11-20 Vladimir Vasilyev

Ellipticity of boundary value problems is characterized in terms of the Calderon projector. The presence of topological obstructions for the chiral Dirac operator under local boundary conditions in even dimension is discussed. Functional…

Mathematical Physics · Physics 2009-10-30 H. Falomir

We review the definition of a Lie manifold $(M, \VV)$ and the construction of the algebra $\Psi\sp{\infty}\sb{\VV}(M)$ of pseudodifferential operators on a Lie manifold $(M, \VV)$. We give some concrete Fredholmness conditions for…

Analysis of PDEs · Mathematics 2025-10-20 Victor Nistor

We establish an index theorem for Toeplitz operators on odd dimensional spin manifolds with boundary. It may be thought of as an odd dimensional analogue of the Atiyah-Patodi-Singer index theorem for Dirac operators on manifolds with…

Differential Geometry · Mathematics 2007-05-23 Xianzhe Dai , Weiping Zhang

An approach to the construction of index formulas for elliptic operators on singular manifolds is suggested on the basis of K-theory of algebras and cyclic cohomology. The equivalence of Toeplitz and pseudodifferential quantizations, well…

Analysis of PDEs · Mathematics 2011-11-08 V. Nazaikinskii , G. Rozenblum , A. Savin , B. Sternin

This is a review of some coordinate-free calculi of pseudodifferential operators developed in the last years. As an application, we use a coordinate-free calculus to obtain new results on the behaviour of the spectral projections of a…

Analysis of PDEs · Mathematics 2011-06-21 P. Mckeag , Y. Safarov

To empower the mathematical hitchhiker wishing to use operator methods in geometry and topology, we present this user's guide to first-order elliptic boundary value problems. Existence, regularity, and Fredholmness are discussed for general…

Analysis of PDEs · Mathematics 2025-10-21 Christian Baer , Lashi Bandara