DEMOIVRE, ABRAHAM (1667-1754), English math ematician of French Huguenot extraction, was born at Vitry, Champagne, on May 26, 1667. His eminence as a mathematician secured his admission into the Royal Society in 1697, and also led to his being appointed by the Royal Society to decide the famous contract between Newton and G. W. Leibnitz. He was an intimate personal friend of Newton. Demoivre lived a quiet and uneventful life and died in London on Nov. 27, 1754. Two impor tant theorems in trigonometry bear his name. (See TRIGONOM ETRY.) The majority of his papers appeared in Philosophical Transactions. Among his separately published works the most important are: The Doctrine of Chances (1716), in which he for mulated the theory of recurring series, completed the theory of partial fractions, and laid down the rule for the probability of a compound event. Miscellanea Analytica (I 73o) contains his trig onometrical theorems.