Blaise Pascal - PowerPoint by HC12110511244


									      Blaise Pascal
17th Century Western Philosopher
            Biographical Overview

Pascal was born on June 19, 1623 in Clermont, France.
In 1626 his mother passed away when he was three years
In 1631, the family moved to Paris.
Pascal was a child prodigy educated by his father, who
was a local judge in tax court.

In 1646 his family converted to Jansenism religion.

 Pascal was a French physicist, mathematician, and
religious philosopher.
His health was never good and he died on August 19, 1662
at the age of 39.
Pascal invented the hydraulic press and the syringe (not hypodermic).
On the hydraulic press
 - at one end of the system is a piston with a small cross-
   sectional area driven by a lever to increase the force.

 - small-diameter tubing leads to the other end of the

  Hydraulic force increase        Hydraulic Press             Syringe

Pascal’s Law applies to the hydraulic press.

Pascal refuted Aristotle’s followers who insisted that nature abhors a
- Pascal gave reasoning to why a genuine vacuum could and did
  exist above the mercury in the barometer.

- He detailed basic rules describing to what degree various liquids
  could be supported by air pressure.

- He also provided reasons why it was indeed a vacuum above the
  column of liquid in a barometer tube.

Pascal invented the first digital calculator, the Pascaline.


Pascal’s Triangle was developed through his discovery work
done on Binomial coefficients.

(a+b)n (where n = 0,1,2,3…), we get the Pascal’s Triangle.

                           Pascal’s Triangle

Pascal Theorem was developed from his discovery work done
on conic sections in projective geometry.

In Geometry, Pascal looked into the issue of discovering truths.
   - Pascal argued that the procedure used in geometry was as
     perfect as possible, with certain principles assumed and other
     propositions developed from them.

 - Nevertheless, there was no way to know the assumed principles
   to be true.

Also in Geometry he developed a theory of definition.
 - Only definitions with conventional labels were important to
   science and math, arguing that those fields should adopt the
   philosophy of formalism.

 Pascal's Wager charted new territory in probability theory and
was one of the first attempts to make use of the concept of
infinity, and marked the first formal use of decision theory.

E means Existence. ∞ means infinite. f1, f2, and f3 means finite. p is
your positive, non-infinite probability for God's existence): E(wager for
God) = ∞*p + f1*(1 − p) = ∞
That is, your expected utility of belief in God is an infinite force.

On the other hand, wagering against God is:
E(wager against God) = f2*p + f3*(1 − p)
This is finite. Rationality requires you to perform the act of maximum
expected utility. Therefore, rationality requires you to wager for God.
Essai pour les coniques (Essay on Conics) 1639 - Reasoning text and
geometric drawings explaining conic sections.

Experiences nouvelles touchant le vide ("New Experiments with the
Vacuum") (1647) - Reasoning why a genuine vacuum could and did exist
above the mercury in the barometer.

Traité du triangle arithmétique ("Treatise on the Arithmetical Triangle")
(1653) - Foundation of probability theory as the originator of the concept of
expectation and its use recursively to solve the ‘Problem of Points’, as well
as the justification for calling the arithmetical triangle ‘Pascal’s triangle’.

Lettres provinciales (Provincial letters) (1657 or 1658) - Letters
defending Jansenists against the Jesuits by attacking casuistry, a popular
ethical method used by Catholic thinkers. He denounced casuistry as the
mere use of complex reasoning to justify moral laxity and all sorts of sins.
De l'Esprit géométrique ("On the Geometrical Spirit") (1657 or 1658) -
The issue of discovering truths and he developed a theory of definition.

Écrit sur la signature du formulaire ("Writ on the Signing of the Form")
(1661) - Exhorting the Jansenists not to give in.

Pensees ("Thoughts") (incomplete at death) - Written in defense of the
Christian religion.
                 Long Term Significant’s
Pascal has been given to the SI unit of pressure, to a programming
language, Pascal’s law, Pascal's triangle and Pascal's wager.

Pascal’s law is still used today in Physics.

Pascal’s triangle and probability theory is still used today in Mathematics.

The calculator is still used today for computation.

Probability theory is it is extremely important today in economics, especially
in actuarial science, in the way we regard uncertainty, risk, decision-making,
and an individual's and society's ability to influence the course of future
events .
"Blaise Pascal." From Wikipedia, the free encyclopedia. 23 Jan. 2009.
   Wikimedia Foundation, Inc. 23 Jan 2009

Hajek, Alan. "Pascal’s Wager." Stanford Encyclopedia of Philosophy. 4 Jun. 2008.
   Stanford University. 23 Jan. 2009

"Pascaline." 1642 France. The History of Computing Project. 5 Aug. 2007.
  23 Jan. 2009

Pascal's Law and Bernoulli's Principle." 23 Jan 2009

"Pascal’s Theorem." Sci-Tech Dictionary: Pascal’s theorem. 2008. Answers
Corporation. 23 Jan 2009

"Pascal’s Triangle." IES Inc. 23 Jan 2009

"Pascal’s Triangle." Site Suggestions. 2009. Drexel University. 23 Jan. 2009
Jansenism: branch of Catholic Gallican thought which arose in the frame of the
Counter-Reformation and the aftermath of the Council of Trent (1545-1563).

Hydraulic Press: a hydraulic mechanism in which a large lifting or compressive
force applied by a piston to a small area is transmitted through water to another
piston having a large area.

Pascal’s Law: when pressure is applied to a contained fluid, the force is transmitted
equally in all directions.

Pascaline: the first digital calculating machine.

Pascal’s Triangle: is a geometric arrangement of the Binomial coefficients in a

Pascal's Theorem: when one inscribes a simple hexagon in a conic, the three
pairs of opposite sides meet in collinear points.

Pascal's Wager: even though the existence of God cannot be determined through
reason, a person should "wager" as though God exists.

1. Did you plan to do further research and developed of the

2. Did you plan to do further research with hydraulic pressure?

3. What more would you have said in the Pensees?

To top