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Leonhard Paul Euler (Mathematician, Physicist) 1707-1783


Leonhard Eular Demographics:
  • Name - Leonhard Paul Euler (pictured)
  • Born - 15 April 1707 (Basel)
  • Died - 18 September 1783
  • Nationality - Swiss
  • Wife - Katharina Gsell (17071773)
  • Father - Paul Euler, a pastor of the Reformed Church.
  • Mother - Marguerite Brucker, a pastor's daughter.
  • Sisters - Anna Maria & Maria Magdalena.
Leonhard Euler Professional Facts:
  • Mathematician & physicist.
  • Considered one of the greatest mathematicians of all time.
  • In mathematics made important discoveries in calculus & other fields.
  • Introduced many new mathematical terminologies, & notations.
  • Made important contributions to astronomy, fluid dynamics, mechanics, & optics.
Leonhard Eular Life:
  • Soon after his birth, the family moved from Basel to Riehen.
  • Euler spent most of his childhood in Riehen.
  • In 1726, Euler completed his Ph.D. thesis on the propagation of sound, entitled De Sono.
  • Lived most of his life in Russia and Germany.
  • Devout Lutheran Christian & believed in the bible strongly, writing apologetics.

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Euler's Number (e) (Mathematical Constant)

Euler's number is the mathematical constant e, named after the Swiss mathematician Leonard Euler.
Euler's number (e) is also commonly defined as the base of the natural logarithm.
It is an irrational number.
The value of e truncated to 10 decimal places is - 2.71828 18284 .....

Tags:
Euler's Number - Irrational Number - Leonard Euler - Mathematical Constant - Natural Logarithm

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Irrational Number (Mathematics)

An irrational number is any real number that is not a rational number.

Irrational numbers cannot be expressed as a fraction, ie a/b.


Irrational Number Examples Include:

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Pi (Mathematical Constant)

Pi Facts:
  • Pi (π) is a mathematical constant.
  • The value is the ratio of a circle's circumference to its diameter.
  • Same as the value of the ratio of a circle's area to the square of its radius.
  • Approximately equal to 3.14159.
  • Extremely important as used in many scientific and mathematical formulae.
  • Pi is an irrational number.
  • World Records are kept for the recitation of pi to increasingly more decimal places.
Related Links:

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Feynman Point - Occurrence in Pi of Six 9s

A numerical sequence in Pi, named after Richard Feynman, where there is an occurence of six 9s beginning from the 762nd decimal place.

3.1415926535897
9323846264338 3279502884197 1693993751058 2097494459230 7816406286208 9986280348253 4211706798214 8086513282306 6470938446095 5058223172535 9408128481117 4502841027019 3852110555964 4622948954930 3819644288109 7566593344612 8475648233786 7831652712019 0914564856692 3460348610454 3266482133936 0726024914127 3724587006606 3155881748815 2092096282925 4091715364367 8925903600113 3053054882046 6521384146951 9415116094330 5727036575959 1953092186117 3819326117931 0511854807446 2379962749567 3518857527248 9122793818301 1949129833673 3624406566430 8602139494639 5224737190702 1798609437027 7053921717629 3176752384674 8184676694051 3200056812714 5263560827785 7713427577896 0917363717872 1468440901224 9534301465495 8537105079227 9689258923542 0199561121290 2196086403441 8159813629774 7713099605187 0721134999999


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Richard Feynman (Physicist, Nobel Prize 1965) 1918-1988

Richard Feynman Demographics:
  • Name - Richard Phillips Feynman
  • DOB - May 11, 1918.
  • Death - February 15, 1988.
  • Born - Far Rockaway, Queens, New York.
  • Nationality - American
Richard Feynman Education:
  • His father was a major inspiration in teaching Feynman how to think.
  • Reportedly had a measured IQ of 125.
  • By the age of 15 years, Feynman had taught himself both differential and integral calculus.

Richard Feynman Professional Facts:
  • Physicist.
  • Was Richard Chace Tolman professor in theoretical physics at Caltech (see picture with L-R: Donald Glaser, Richard Feynman, Robert Bacher, and Robert Leighton at the California Institute of Technology).
  • Won Nobel Physics Prize (1965) for his contributions to the development of quantum electrodynamics, in conjunction with Julian Schwinger and Sin-Itiro Tomonaga.
  • Described the path integral formulation of quantum mechanics, the theory of quantum electrodynamics and the physics of the superfluidity of supercooled liquid helium, as
  • His work in particle physics lead to the proposed parton model.
  • Developed the Feynman diagrams to represent the mathematical expressions governing the behavior of subatomic particles.
  • Was involved in the Manhattan Project in World War II which led to the development of the Atomic Bomb.
  • Panel member involved in investigating the Space Shuttle Challenger disaster.

Other Scientific Interests:
  • Biology
  • Pioneered quantum computing
  • He introduced the concept of nanotechnology.
Richard Feynman & Popular Culture:
  • Popularized physics in both his books and lectures, in particular 'The Feynman Lectures on Physics.'
  • Wrote a series of semi-autobiographical books including Surely You're Joking, Mr. Feynman! and What Do You Care What Other People Think?
  • Another popular work was 'No Ordinary Genius: The Illustrated Richard Feynman.'
Richard Feynman Non scientific Interests:
  • Amateur painter
  • Bongo player
  • Juggler
  • Prankster
  • Safecracker and lock picker
  • Strip clubs as places to think through difficult academic problems.
Richard Feynman was not a fan of the Social Sciences (see video below).



Richard Feynman playing the bongo drums.



Related Links:

Image Credits -
by Emilio Segre Visual Archives
Tags: 1965 - Bongo Drums - Caltech - Differential Calculus - Feynman Diagrams - Integral Calculus - Manhattan Project - Nanotechnology - Physicist - Physics - Prankster - Quantum Electrodynamics - Richard Feynman
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