Document Type : Research Paper

Authors

• M. Alimohammady
• M. K. Kalleji

Department of Mathematics, University of Mazandaran, Babolsar 47416-1468, Iran.

Abstract

In this paper we study properties of symbols such that these belong to class of symbols sitting inside $S_{\rho ,\phi }^m$ that we shall introduce as the following. So for because hypoelliptic pseudodifferential operators play a key role in quantum mechanics we will investigate some properties of $M$−hypoelliptic pseudo differential operators for which define base on this class of symbols. Also we consider maximal and minimal operators of $M$-hypoelliptic pseudo differential operators and we express some results about these operators.

Keywords

• pseudo differential operator
• elliptic operator
• hypoelliptic operator
• parametrix operator