Pseudodifferential operators on manifolds with linearization

TL;DR

This paper develops a global pseudodifferential calculus on certain non-compact manifolds with linearization, enabling analysis similar to Euclidean spaces and applicable to hyperbolic spaces.

Contribution

It introduces a coordinate-independent symbol calculus on manifolds with linearization, generalizing the standard Euclidean pseudodifferential calculus to a broader class of non-compact manifolds.

Findings

Constructed a global symbol calculus on manifolds with linearization.

Proved stability of pseudodifferential classes under composition.

Demonstrated $L^2$-continuity and applied to hyperbolic space.

Abstract

We present in this paper the construction of a pseudodifferential calculus on smooth non-compact manifolds associated to a globally defined and coordinate independant complete symbol calculus, that generalizes the standard pseudodifferential calculus on $\R^n$. We consider the case of manifolds $M$ with linearization in the sense of Bokobza-Haggiag, such that the associated (abstract) exponential map provides global diffeomorphisms of $M$ with $\R^n$ at any point. Cartan--Hadamard manifolds are special cases of such manifolds. The abstract exponential map encodes a notion of infinity on the manifold that allows, modulo some hypothesis of $S_\sigma$-bounded geometry, to define the Schwartz space of rapidly decaying functions, globally defined Fourier transformation and classes of symbols with uniform and decaying control over the $x$ variable. Given a linearization on the manifold with some properties of control at infinity, we construct symbol maps and $\la$-quantization, explicit Moyal star-product on the cotangent bundle, and classes of pseudodifferential operators. We show that these classes are stable under composition, and that the $\la$-quantization map gives an algebra isomorphism (which depends on the linearization) between symbols and pseudodifferential operators. We study, in our setting, $L^2$-continuity and give some examples. We show in particular that the hyperbolic 2-space $\HH$ has a $S_1$-bounded geometry, allowing the construction of a global symbol calculus of pseudodifferential operators on $\S(\HH)$.