DE MORGAN, AUGUSTUS

(1806–1871)

English mathematician and logician. De Morgan was born in India and educated at Cambridge, and became first professor of mathematics at the university of London. He wrote widely on mathematics and astronomy. HisEssay on Probabilities(1838),Formal Logic(1847), andSyllabus of a Proposed System of Logic(1860), together with the informalBudget of Paradoxes(1872), represent his work in logic and scientific method. De Morgan was a pioneer in recognizing the close affinities between logic and algebra, in recognizing the importance of a doctrine of predication, and in opening up the logic of relations.