in this paper we study properties of symbols such that these belong to class of symbols sitting insidesm ρ,φ that we shall introduce as the following. so for because hypoelliptic pseudodifferential operatorsplays a key role in quantum mechanics we will investigate some properties of m−hypoelliptic pseudodifferential operators for which define base on this class of symbols. also we consider maxi...

This prospective longitudinal study was done to determine extent of tumor and to highlight the importance of lateral rhinotomy approach for nasopharyngeal angiofibroma. Patients with a diagnosis of nasopharyngeal angiofibroma who underwent surgery in Tribhuvan University Teaching Hospital, Maharajgunj, Kathmandu from April, 2004 to Jan 2009 were included in the study. Extent of tumour and surgi...

In this contribution we give a brief review of the theory of integer estimation as it has been developed for use with the Global Positioning System (GPS). First we consider the GPS observation equations (GPS and Integers). These observation equations are not of the usual type, since some of the parameters are known to be integer. This implies that an extention of ’classical’ adjustment theory i...

V. A. PETROV AND A. V. PROKUDIN Institute For High Energy Physics, 142284 Protvino , Russia E-mail: [email protected] [email protected] We develop an off-shell extention of the Regge-eikonal approach which automatically takes into account off-shell unitarity. We argue that exclusive vector-meson production cross-sections measured at HERA can be fairly described with classical universal Regge...