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Relative index theorems, which deal with what happens with the index of elliptic operators when cutting and pasting, are abundant in the literature. It is desirable to obtain similar theorems for other stable homotopy invariants, not the…

K-Theory and Homology · Mathematics 2013-07-11 V. E. Nazaikinskii

We consider a invariant Dirac operator D on a manifold with a proper and cocompact action of a discrete group G. It gives rise to an equivariant K-homology class [D]. We show how the index of the induced orbifold Dirac operator can be…

K-Theory and Homology · Mathematics 2007-05-23 Ulrich Bunke

Consider an elliptic self-adjoint pseudodifferential operator $A$ acting on $m$-columns of half-densities on a closed manifold $M$, whose principal symbol is assumed to have simple eigenvalues. We show existence and uniqueness of $m$…

Analysis of PDEs · Mathematics 2022-02-09 Matteo Capoferri , Dmitri Vassiliev

In this paper we discuss some spectral invariance results for non-smooth pseudodifferential operators with coefficients in H\"older spaces. In analogy to the proof in the smooth case of Beals and Ueberberg, we use the characterization of…

Functional Analysis · Mathematics 2016-01-06 Helmut Abels , Christine Pfeuffer

The notion of pseudo-differential operators with coefficients in a continuous trace algebra over a manifold are introduced and their index theory is studied. The algebra of principal symbols in this calculus provides an abstract Poincar\'e…

K-Theory and Homology · Mathematics 2011-11-14 Magnus Goffeng

We prove that the index formula for $b$-elliptic cone differential operators given by M. Lesch holds verbatim for operators whose coefficients are not necessarily independent of the normal variable near the boundary. We also show that, for…

Analysis of PDEs · Mathematics 2007-05-23 Juan B. Gil , Paul A. Loya , Gerardo A. Mendoza

We give an index formula for elliptic differential operators whose coefficients include shifts forming an infinite group.

Operator Algebras · Mathematics 2007-07-26 V. E. Nazaikinskii , A. Yu. Savin , B. Yu. Sternin

The homotopy groups of the (stabilized) group of invertible pseudodifferential operators of order zero acting on a closed manifold X are computed in terms of the K-theory of the cosphere bundle S*X. At the same time, we show that the…

Differential Geometry · Mathematics 2007-05-23 Frederic Rochon

Parameter--elliptic pseudodifferential operators given on a closed smooth manifold are investigated on the extended Sobolev scale. This scale consists of all Hilbert spaces that are interpolation spaces with respect to the Hilbert Sobolev…

Analysis of PDEs · Mathematics 2013-11-06 Aleksandr A. Murach , Tetiana Zinchenko

We define an analytic index and prove a topological index theorem for a non-compact manifold $M\_0$ with poly-cylindrical ends. We prove that an elliptic operator $P$ on $M\_0$ has an invertible perturbation $P+R$ by a lower order operator…

K-Theory and Homology · Mathematics 2019-02-20 Bertrand Monthubert , Victor Nistor

We give a systematic treatment of index theory on Pin manifolds, based on the Clifford linear Dirac operator and differential KO-theory. This expository article is based on joint work with Mike Hopkins.

Differential Geometry · Mathematics 2024-07-26 Daniel S. Freed

This paper is a continuation of arXiv:0706.3511, where we obtained a local index formula for matrix elliptic operators with shifts. Here we establish a cohomological index formula of Atiyah-Singer type for elliptic differential operators…

Operator Algebras · Mathematics 2007-07-27 V. E. Nazaikinskii , A. Yu. Savin , B. Yu. 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

This paper is the continuation of Part I, expanding previous results of math.DG/9803051. This paper uses techniques in noncommutative geometry as developed by Alain Connes in order to study the twisted higher index theory of elliptic…

Differential Geometry · Mathematics 2009-10-31 Matilde Marcolli , Varghese Mathai

In this first part of the paper, we define a natural dual object for manifolds with corners and show how pseudodifferential calculus on such manifolds can be constructed in terms of the localization principle in C*-algebras. In the second…

Operator Algebras · Mathematics 2007-05-23 V. E. Nazaikinskii , A. Yu. Savin , B. Yu. Sternin

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

We introduce a parametrized version of scissors congruence $K$-theory of manifolds with tangential structure, which includes a topologized version of the scissors congruence $K$-theory of oriented manifolds as a special case. We examine the…

Algebraic Topology · Mathematics 2026-04-03 Mona Merling , George Raptis , Julia Semikina

We compute explicitly the K-groups of some boundary groupoid C*-algebras with exponential isotropy subgroups. Then we derive index formulas that computes the K-theoretic and Fredholm indexes of elliptic (respectively totally elliptic)…

K-Theory and Homology · Mathematics 2018-04-30 Bing Kwan So

We give complete geometric invariants of cobordisms of fold maps with oriented singular set and cobordisms of even codimensional fold maps. These invariants are given in terms of cobordisms of stably framed manifolds and cobordisms of…

Geometric Topology · Mathematics 2008-06-11 Boldizsar Kalmar

We construct the coarse index class with support condition (as an element of coarse $K$-homology) of an equivariant Dirac operator on a complete Riemannian manifold endowed with a proper, isometric action of a group. We further show a…

Differential Geometry · Mathematics 2025-05-14 Ulrich Bunke , Alexander Engel