(1806-1871) English mathematician and logician. Professor of mathematics at University College, London, 1828-1831, 1836-1866. His Formal Logic of 1847 contains some points of an algebra of logic essentially similar to that of Boole (q. v.), but the notation is less adequate than Boole’s and the calculus is less fully worked out and applied. De Morgan, however, had the notion of logical sum for arbitrary classes — whereas Boole contemplated addition only of classes having no members in common. De Morgan’s laws (q. v.) — as they are now known — were also enunciated in this work. The treatment of the syllogism is original, but has since been susperseded, and does not constitute the author’s real claim to remembrance as a logician. (The famous controversy with Sir William Hamilton over the latter’s charge of plagiarism in connection with this treatment of the syllogism may therefore be dismissed as not of present interest.)<\/p>\n
Through his paper On the syllogism, no. IV in the Transactions of the Cambridge Philosophical Society, vol. 10 (read April 23, 1860), De Morgan is to be regarded as the founder of the logic of relations. — A. C.<\/p>\n
Sophia Elizabeth De Morgan, Memoir of Augustus De Morgan. London, 1882.<\/p>\n
De Morgan, Augustus (1806-1871) English mathematician and logician. Professor of mathematics at University College, London, 1828-1831, 1836-1866. His Formal Logic of 1847 contains some points of an algebra of logic essentially similar to that of Boole (q. v.), but the notation is less adequate than Boole’s and the calculus is less fully worked out and … Continue reading “De Morgan, Augustus”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-41934","post","type-post","status-publish","format-standard","hentry","category-encyclopedic-dictionary"],"_links":{"self":[{"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/posts\/41934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/comments?post=41934"}],"version-history":[{"count":0,"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/posts\/41934\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/media?parent=41934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/categories?post=41934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.biblia.work\/dictionaries\/wp-json\/wp\/v2\/tags?post=41934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}