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...

We introduce a framework for online structure theory. Our approach generalises notions arising independently in several areas of computability theory and complexity suggest unifying using operators where we allow the input to be countable object an arbitrary complexity. give new which (i) ties algorithms with computable analysis, (ii) shows how use modifications from such as Weihrauch reducibil...

“The preparation of essentially descriptive accounts of immigration into particular countries, together with indications of the supposed effects produced by this immigration, entails little difficulty. Much difficulty, however, besets attempts to isolate and evaluate with precision specific effects, economic and otherwise, produced in countries of immigration by foreign-born individuals who cam...