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 establish a semantics for building grammars from a modularised specification in which modules are able to delete productions from imported nonterminals. Modules have import lists of nonterminals; some or all of an imported nonterminal’s productions may be suppressed at import time. There are two basic import mechanisms which (a) reference or (b) clone an imported nonterminal’s productions. O...

symbol is a term. a term or an index which has some paradoxical meanings, in addition to its conventional meaning. symbols are not innovated, they come from human's creative dreams and imaginations and they show unknown things.old men didn't think about their symbols, they lived with them. so we, as interpreters of dreams, should pay attention not only to the symbol by itself, but als...

myths are reflective of human concerns and needs during ancient times. by reviewing them, it turns out that many human problems today, have a historical background. among the main themes of ancient mythologies, fertility and reproduction have various representations in ancient civilizations. the purpose of this paper was to review myths and common symbols of fertility and reproduction in ancien...

This paper mainly focuses on the utilization frequency in receiving end of communication systems, which shows the inclination of the user about different symbols. When the average number of use is limited, a specific utility distribution is proposed on the best effort in term of fairness, which is also the closest one to occurring probability in the relative entropy. Similar to a switch, its pa...