In this paper, we use the structure theory to prove an analog to a well-known theorem of Herstein as follows: Let R be a ring with center C such that for all x,y ? R either [x,y]= 0 or x-x [x,y]? C for some non negative integer n= n(x,y) dependingon x and y. Then R is commutative.

Oil is the driving force for the modern economy as a cheap energy source and its reliable supply of oil is therefore a crucial element of economic growth. Oil resources however, are unevenly distributed and concentrated into only a few, on average, emerging economies. Inefficient and ineffective resource management can jeopardize the secure flow of oil. Especially since these supplying countrie...

Purpose to find out and analyze the implementation what factors hinder support of Regional Regulation Number 4 2018 concerning Industrial Development Plan North Sumatra Province for 2018-2038 at Industry Trade Office Province. This research is a descriptive study with qualitative approach. For analysis, theory that researcher uses Edward III. Based on III's Theory, indicators affecting are: Com...

in this paper, we use the structure theory to prove an analog to a well-known theorem of herstein as follows: let r be a ring with center c such that for all x,y ? r either [x,y]= 0 or x-x [x,y]? c for some non negative integer n= n(x,y) dependingon x and y. then r is commutative.

The Indo-Persian state secretary has occupied center stage in the emerging discourse on bureaucracy, administration and the political formation of the Mughal state. The status and role of the munsh? (the IndoPersian state secretary) within the Mughal bureaucratic structure in 17th and 18th century have formed the basis of recent historical analysis. Scholarship on the Indo-Persian munsh? have b...