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# Title: Pseudo-differential operators with nonlinear quantizing functions

Abstract: In this paper we develop the calculus of pseudo-differential operators corresponding to the quantizations of the form $$Au(x)=\int_{\mathbb{R}^n}\int_{\mathbb{R}^n}e^{i(x-y)\cdot\xi}\sigma(x+\tau(y-x),\xi)u(y)dyd\xi,$$ where $\tau:\mathbb{R}^n\to\mathbb{R}^n$ is a general function. In particular, for the linear choices $\tau(x)=0$, $\tau(x)=x$, and $\tau(x)=\frac{x}{2}$ this covers the well-known Kohn-Nirenberg, anti-Kohn-Nirenberg, and Weyl quantizations, respectively. Quantizations of such type appear naturally in the analysis on nilpotent Lie groups for polynomial functions $\tau$ and here we investigate the corresponding calculus in the model case of $\mathbb{R}^n$. We also give examples of nonlinear $\tau$ appearing on the polarised and non-polarised Heisenberg groups, inspired by the recent joint work with Marius Mantoiu.
 Comments: 26 pages Subjects: Functional Analysis (math.FA); Analysis of PDEs (math.AP); Operator Algebras (math.OA) MSC classes: 35S05, 47G30, 43A70, 43A80, 22E25 Cite as: arXiv:1803.06432 [math.FA] (or arXiv:1803.06432v1 [math.FA] for this version)

## Submission history

From: Michael Ruzhansky [view email]
[v1] Sat, 17 Mar 2018 00:21:12 GMT (21kb)