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This paper surveys topological results obtained from characteristic classes built from the two types of traces on the algebra of pseudodifferential operators of nonpositive order. The main results are the construction of a universal $\hat…

Differential Geometry · Mathematics 2015-08-03 Yoshiaki Maeda , Steven Rosenberg

We compute the Chern-Connes character (a map from the $K$-theory of a C$^*$-algebra under the action of a Lie group to the cohomology of its Lie algebra) for the $L^2$-norm closure of the algebra of all classical zero-order…

Operator Algebras · Mathematics 2011-12-12 David P. Dias , Severino T. Melo

We introduce the notion of a differential operator on C*-algebras. This is a noncommutative analogue of a differential operator on a smooth manifold. We show that the common closed domain of all differential operators is closed under smooth…

Operator Algebras · Mathematics 2024-09-04 Omar Mohsen

For a pseudodifferential boundary operator A of integer order \nu and class zero (in the Boutet de Monvel calculus) on a compact n-dimensional manifold with boundary, we consider the function Trace(AB^{-s}) where B is an auxiliary system…

Analysis of PDEs · Mathematics 2007-05-23 Gerd Grubb , Elmar Schrohe

The methods of spectral geometry are useful for investigating the metric aspects of noncommutative geometry and in these contexts require extensive use of pseudo-differential operators. In a foundational paper, Connes showed that, by direct…

Operator Algebras · Mathematics 2018-03-14 Jim Tao

In [3], Connes found a conformal invariant using Wodzicki's 1-density and computed it in the case of 4-dimensional manifold without boundary. In [14], Ugalde generalized the Connes' result to $n$-dimensional manifold without boundary. In…

Differential Geometry · Mathematics 2009-11-11 Yong Wang

We prove the analogue of Weyl's law for a noncommutative Riemannian manifold, namely the noncommutative two torus $\mathbb{T}_\theta^2$ equipped with a general translation invariant conformal structure and a Weyl conformal factor. This is…

Quantum Algebra · Mathematics 2015-06-03 Farzad Fathizadeh , Masoud Khalkhali

To supplement the already known classification of traces on classical pseudodifferential operators, we present a classification of traces on the algebras of odd-class pseudodifferential operators of non-positive order acting on smooth…

Operator Algebras · Mathematics 2012-04-24 Carolina Neira Jiménez , Marie Françoise Ouedraogo

A well known result on pseudodifferential operators states that the noncommutative residue (Wodzicki residue) of a pseudodifferential projection vanishes. This statement is non-local and implies the regularity of the eta invariant at zero…

Differential Geometry · Mathematics 2015-09-17 Jörg Seiler , Alexander Strohmaier

Let D be a holomorphic differential operator acting on sections of a holomorphic vector bundle on an n-dimensional compact complex manifold. We prove a formula, conjectured by Feigin and Shoikhet, for the Lefschetz number of D as the…

Quantum Algebra · Mathematics 2008-02-12 Markus Engeli , Giovanni Felder

We consider an algebra $\mathscr A$ of Fourier integral operators on $\mathbb R^n$. It consists of all operators $D: \mathscr S(\mathbb R^n)\to \mathscr S(\mathbb R^n)$ on the Schwartz space $\mathscr S(\mathbb R^n)$ that can be written as…

Operator Algebras · Mathematics 2024-05-29 Anton Savin , Elmar Schrohe

For a smooth manifold with boundary we construct a semigroupoid and a continuous field of C*-algebras which extend Connes' construction of the tangent groupoid. We show the asymptotic multiplicativity of \hbar-scaled truncated…

Functional Analysis · Mathematics 2007-05-23 Johannes Aastrup , Ryszard Nest , Elmar Schrohe

We prove an index theorem for families of pseudodifferential operators generalizing those studied by C. Callias, N. Anghel and others. Specifically, we consider operators on a manifold with boundary equipped with an asymptotically conic…

K-Theory and Homology · Mathematics 2012-10-09 Chris Kottke

We give an algebraic/geometric characterization of the classical pseudodifferential operators on a smooth manifold in terms of the tangent groupoid and its natural $\mathbb{R}^\times_+$-action. Specifically, we show that a properly…

Differential Geometry · Mathematics 2017-07-28 Erik Van Erp , Robert Yuncken

We prove that if $M\subset \mathbb{R}^n$ is a bounded subanalytic submanifold of $\mathbb{R}^n$ such that $B(x_0,\epsilon)\cap M$ is connected for every $x_0\in\overline{M}$ and $\epsilon>0$ small, then, for $p\in [1,\infty)$ sufficiently…

Functional Analysis · Mathematics 2021-10-22 Anna Valette , Guillaume Valette

We generalize Roe's Index Theorem for operators of Dirac type on open manifolds to elliptic pseudodifferential operators. To this end we introduce a class of pseudodifferential operators on manifolds of bounded geometry which is more…

Differential Geometry · Mathematics 2014-10-30 Alexander Engel

Given a smooth manifold $M$ (with or without boundary), in this paper we study the regularisation of traces for the global pseudo-differential calculus in the context of non-harmonic analysis. Indeed, using the global pseudo-differential…

Analysis of PDEs · Mathematics 2021-01-18 Duván Cardona , Vishvesh Kumar , Michael Ruzhansky , Niyaz Tokmagambetov

The main object considered in this paper is the trace function, defined as a suitably normalized trace of a product of intertwining operators for the Drinfeld-Jimbo quantum group, multiplied by the exponential of an element of the Cartan…

Quantum Algebra · Mathematics 2007-05-23 Pavel Etingof , Alexander Varchenko

This paper introduces a new approach to the non-normal Dixmier and Connes-Dixmier traces (introduced by Dixmier and adapted to non-commutative geometry by Connes) on a general Marcinkiewicz space associated with an arbitrary semifinite von…

Functional Analysis · Mathematics 2010-04-09 Steven Lord , Aleksandr Sedaev , Fyodor Sukochev

We continue the study of the relationship between Dixmier traces and noncommutative residues initiated by A. Connes. The utility of the residue approach to Dixmier traces is shown by a characterisation of the noncommutative integral in…

Operator Algebras · Mathematics 2010-07-13 Steven Lord , Fedor A. Sukochev