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Clarke, Arthur C.

(Encyclopedia)Clarke, Arthur C. (Sir Arthur Charles Clarke), 1917–2008, British science fiction writer. During World War II he served as a radar instructor and aviator in the Royal Air Force. After the war he obt...

madrasa

(Encyclopedia)madrasa or madrassah, in Islamic countries, a school, historically usually one devoted to higher education in religious studies, but the term may refer to any school. Privately endowed, often by royal...

intuition

(Encyclopedia)intuition, in philosophy, way of knowing directly; immediate apprehension. The Greeks understood intuition to be the grasp of universal principles by the intelligence (nous), as distinguished from the...

Pascal, Blaise

(Encyclopedia)Pascal, Blaise blĕz päskälˈ [key], 1623–62, French scientist and religious philosopher. Studying under the direction of his father, a civil servant, Pascal showed great precocity, especially in ...

Bacon, Roger

(Encyclopedia)Bacon, Roger, c.1214–1294?, English scholastic philosopher and scientist, a Franciscan. He studied at Oxford as well as at the Univ. of Paris and became one of the most celebrated and zealous teache...

Valéry, Paul

(Encyclopedia)Valéry, Paul pōl välārēˈ [key], 1871–1945, French poet and critic. A follower of the symbolists, Valéry was one of the greatest French poets of the 20th cent. He was encouraged by Pierry Loü...

Carnot, Lazare Nicolas Marguerite

(Encyclopedia)Carnot, Lazare Nicolas Marguerite kärnōˈ [key], 1753–1823, French revolutionary, known as the organizer of victory for his role in the French Revolutionary Wars. A military engineer by training,...

infinity

(Encyclopedia)infinity, in mathematics, that which is not finite; it is often indicated by the symbol ∞. A sequence of numbers, a1, a2, a3, … , is said to “approach infinity” if the numbers eventually b...

number theory

(Encyclopedia)number theory, branch of mathematics concerned with the properties of the integers (the numbers 0, 1, −1, 2, −2, 3, −3, …). An important area in number theory is the analysis of prime number...

Comte, Auguste

(Encyclopedia)Comte, Auguste ōgüstˈ kôNt [key], 1798–1857, French philosopher, founder of the school of philosophy known as positivism, educated in Paris. From 1818 to 1824 he contributed to the publications ...