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In the present work we characterize full operators and show some properties for bounded below nonfull operators. Under the results developed for full operators, we afiirrmatively respond two questions formulated by Bravo and Feintuch about algebras generated by invertible operators. ; The author's research was partially supported by a "Misión Ciencia" Research Fellowship (Venezuelan Government) ; peerReviewed

The All-Russian Union of Railwaymen, formed in April 1917, was the largest labor association in revolutionary Russia and by far the most strategically located. The railway workers bestrode the system which carried troops to a crumbling military front and grain to great cities on the edge of famine. Exhausted Russia was so close to catastrophe that the railwaymen enjoyed the power to produce incalculable social effects merely by a stoppage of rail traffic for a few days. They had, moreover, an impressive revolutionary history. In 1905 their hastily and illegally formed organization had led all Russia in a general strike which quickly paralyzed the country and had been directly responsible for wringing a constitution from the autocracy.

There is a revival of interest by economists in ethical issues and beliefs, and by moral philosophers and theologians in economics. This book is intended to make a contribution to this cross-fertilisation of ideas. Rodney Wilson has undertaken an extensive survey of Jewish, Christian and Muslim views on economics, and reviewed the rapidly expanding business ethics literature from a religious perspective. The juxtaposition of the work of theologians and moral philosophers with that of economists results in some interesting comparisons.