## On Infinity; and on the Sign of Equality (pp. 145-189) and A Theorem Relating to Neutral Series (pp. 190-202) and On the Early History of the Signs +_ and – in Transactions of the Cambridge Philosophical Society, Volume XI, Part I, 1866

Cambridge: C. J. Clay at the University Press, 1866. 1st Edition. FIRST EDITION OF THREE PAPERS BY THE 19th c. MATHEMATICIAN & LOGICIAN AUGUSTUS DE MORGAN. “De Morgan exerted a considerable influence on the development of mathematics in the nineteenth century” (DSB, IV, 35). While De Morgan’s framework was conceptual..... More