abstract in the 7th and 8th centuries of hijri, kish island had been the maritime trade center of the persian gulf under the reign of  bani gheisar government, and any changes in this area has affected the neighboring areas and further lands. the objective of this essay is to study the economic changes of kish island and its excellent position in the maritime trade of the persian gulf, oman sea...

The engine of economical phenomena is human action . The reaction engine, presented here, exploits this fact by explicitely making human action the cause of all changes in th e case of a market economy. This offers a natural way of grounding causal reasoning abou t economical phenomena . First this paper shows the limitations of the classical framework of Comparative Statics . Second it motivat...

A number n is said to be economical if the prime power factori-sation of n can be written with no more digits than n itself. We show that under a plausible hypothesis, related to the twin prime conjecture, there are arbitrarily long sequences of consecutive economial numbers, and exhibit such a sequence of length 9.

Nowadays in the light of technological, economical and social changes, the problems of overall occupation of people and continuous growth of economy become more important and complex. Continuous development of people’s knowledge and skills, investment in education and vocational training are the main factors stimulating the economical and social development of the state. This paper analysis the...