Precursors of Modern Logic
PRECURSORS OF MODERN LOGIC
Modern logic, or the logic that is loosely called "mathematical," began in a serious and systematic way with Augustus De Morgan's Formal Logic and George Boole's Mathematical Analysis of Logic, both published in 1847.
But a number of earlier writers were already "modern" in spirit, and of these, four stand out especially sharply—Leibniz, Euler, Lambert, and Bolzano.
See also Bolzano, Bernard; Boole, George; De Morgan, Augustus; Lambert, Johann Heinrich; Leibniz, Gottfried Wilhelm.
(A. N. P.)
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Precursors of Modern Logic