Joseph Louis Lagrange

1

• Joseph Louis Lagrange

By Daniel Tovbin and Wenjun Ouyang of 701
2
Life of Joseph Louis Lagrange

• Joseph Louis Lagrange was born on January 25,
  1736 in Turin, Sardinia.
• Lagrange died on April 10, 1813 in Paris, France.
  He was 77 years old when he died.
• He was influenced by the work of a Halleys
  1693s work on the use of algebra and optics.
• Lagrange was 1 of 11 children.
• He was married to Renée-Françoise-Adélaide Le
  Monnie.

3
Education and Career

• Joseph Louis Lagrange was educated at the college
  of Turin.
• He was then offered to work in the Berlin
  Academy.
• He was a founding member of the Royal Academy of
  Science of Turin.

4
Accomplishments

• What was Joseph Louis Lagrange famous for?
• Lagrange was one of the creators of the calculus
  of variations, which is a field of mathematics
  that deals with a functional.
• He also invented the method of solving
  differential equations.
• He proved that every natural number is the sum of
  four squares, which is now known as Lagranges
  four square theorem.

5
More Accomplishments

• Lagrange solved the resulting system of the n1
  differential equations.
• He applied his methods to the study of Jupiters
  and Saturns orbit.
• He also reduced the equations of the quadrics
  into their canonical forms.

6
Awards and Prizes

• Lagrange was awarded the Grand Croix Ordre
  Imperial de la Reunion.
• He was awarded the 1764 prize of the French
  Academy of Sciences for his memoir on the
  libration of the Moon.
• He won the 1772 prize on the three body problem
  with Euler.
• He had won the 1774 prize for finding about the
  motion of the moon.
• He also had won the 1780 prize on perturbations
  of the orbits of comets by the planets.

7
Interesting Facts

• Some interesting facts about Joseph Louis
  Lagrange are
• Lagrange had worked for Fredrick II of Berlin for
  20 years.
• In his appearance, Lagrange was medium height
  with pale blue eyes and a colorless complexion.
  In character, he was nervous and timid, he
  detested controversy, and he allowed others to
  take credit for things he has done himself.

8
More Interesting Facts

• In 1810, Joseph Louis Lagrange was only able to
  complete two-thirds of the Méchanique analytique
  before his death.
• Lagrange published 2 volumes of his calculus
  lectures.
• Lagranges nervous system was put on too much
  pressure and the doctors said that they would not
  be responsible for certain illnesses. They
  recommended for him to rest. In 1813, he died in
  Paris, France.

9
Picture of the mathematician

• Joseph Louis Lagrange

10
Pictures of Inventions
3 12 12 12 02 31 52 22 12 12
310 172 42 22 12.
                            
An example of the four square theorem.
Calculus Of Variations Equation