(Encyclopedia) commutator, device used in an electric generator to convert the alternating current produced in the generator into direct current before the current is sent into an external circuit;? (Encyclopedia) commutation of sentence, in criminal law, reduction of a sentence for a criminal act by action of the executive head of the government. Like pardon, commutation of sentence is a matter? (Encyclopedia) commutative law, in mathematics, law holding that for a given binary operation (combining two quantities) the order of the quantities is arbitrary; e.g., in addition, the numbers 2 and? (Encyclopedia) ring, in mathematics, system consisting of a set R of elements and two binary operations, such that addition makes R a commutative group and multiplication is associative and? (Encyclopedia) Edwardsville, city (1990 pop. 14,579), seat of Madison co., SW Ill.; inc. 1819. It is mainly residential, with many citizens commuting to St. Louis. A campus of Southern Illinois Univ? (Encyclopedia) Guildford g?lf?rd, town (1991 pop. 61,509) and district, Surrey, SE England, on the Wey River. The county seat of Surrey, Guildford is a market and residential commuter town of London? (Encyclopedia) So Joo de Meriti souN zhwouN ?? m?r?t?, d? m?r?t?, city (1990 est. pop. 508,200), Rio de Janeiro state, SE Brazil, a residential suburb northwest of the city of Rio de Janeiro. It? (Encyclopedia) Barrie, city (1991 pop. 62,728), S Ont., Canada, on the west shore of Lake Simcoe. It is a commuter city in the Toronto metropolitan region. Among the city's diverse manufactures? (Encyclopedia) Welwyn Garden City w?l?n, town (1991 pop. 40,665), Hertfordshire, E central England. It is a garden city, founded by Ebenezer Howard in 1920, as well as one of the new towns. Its? (Encyclopedia) telecommuting, an arrangement by which people work at home using a computer and telephone, accessing work-related materials at a business office, or transmitting materials to an office?