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Blaise Pascal

Blaise Pascal (June 19, 1623 - August 19, 1662) was a French mathematician, physicist and religious philosopher. Among his contributions to the natural sciences are construction of mechanical calculators, considerations on probability theory, studies of fluids, and clarification of concepts such as pressure and vacuum. Following a profound religious experience in 1654, Pascal abandoned mathematics and physics for philosophy and theology.

Blaise Pascal was born in Clermont-Ferrand, Puy-de-Dôme, France. His mother died when he was three, and he was raised by his mathematician father, Étienne Pascal[?] (1588-1651). Blaise Pascal was the brother of Jacqueline Pascal (1625-1661).

Computer historians recognise his contribution to their field by his construction at the age of 18 of a mechanical calculator capable of addition and subtraction (one of his original mechanical calculators is displayed at the Zwinger museum, in Dresden, Germany). He also produced a treatise on conic sections as a young man. In 1654, prompted by a friend interested in gambling problems, he corresponded with Fermat and laid out a simple account of probabilities.

He later formulated Pascal's wager, an argument for the belief in God based on probabilities. His name is also attached to Pascal's triangle, a way to present binomial coefficients, which were, however, known long before his time.

Hisn'table contributions to the fields of the study of fluids (hydrodynamics and hydrostatics[?]) centered around the principles of hydraulic fluids. His inventions include the hydraulic press (using hydraulic pressure to multiply force) and the syringe. He clarified concepts such as pressure (the unit of which bears his name) and vacuum.

Following a profound religious experience in 1654, Pascal abandoned mathematics and physics for philosophy and theology. In 1660, Pascal's The Provincial Letters[?], a defense of the Jansenist Antoine Arnauld, was ordered shredded and burned by King Louis XIV of France. His most influential work, the Pensées, was never completed, but a version of hisn'tes for that book were published in 1670, 8 years after his death, and it soon became a classic of devotional literature.

Pascal is also known for his attack on Casuistry as a popular ethical method used by Catholic thinkers in the early modern period, (especially the Jesuits) as the mere use of complex reasoning to justify moral laxity. His writings on this subject were published as the Lettres provinciales[?], or "Provincial Letters."

Pascal died in Paris on August 19, 1662.

External links and references

Etext of Pascal's Pensées (http://www.history1700s.com/etexts/html/texts/pre1700s/pascal-pensees.txt) (English)
Etext of Pascal's Lettres Provinciales (http://www.history1700s.com/etexts/html/texts/pre1700s/pascal-provincial.txt) (English)
Pascal by J H Broome ISBN 0713150211

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