## 1854 – Poincare – bio

Henri Poincare was born in Nancy, France in 1854 and was a mathematician, physicist and philosopher. He may be best known for posing a theoretical problem in topology called “the Poincare Conjecture” which is a problem in topology about how a sphere can be defined by dealing with the characteristics of a three dimensional manifold. While working on a class of problems in orbital mechanics known as “the three body problem”, Poincare discovered what is now known as chaos theory. Lorentz and Poincare discovered much of the foundation of special relativity at the same time as Albert Einstein.

**Poincare Contemplates Copernicus** – [mathpages.com]

In June of 1905 the theory of special relativity was described in two papers, one written by Henri Poincare, and the other by Albert Einstein. Poincare sent his paper “On the Dynamics of the Electron” to the Academy of Science in Paris on June 5, and Einstein submitted his paper “On the Electrodynamics of Moving Bodies” to the Annalen der Physik on June 30. Poincare followed up with a more detailed paper (now often referred to as the Palermo paper) in July, and Einstein followed with his paper “Does the Inertia of a Body Depend on Its Energy Content?” in September.

PRECURSOR:

**1643 – Newton**

**1707 – Euler**

1808 – Listing

1822 – Hermite

1822 – Bertrand

1823 – Betti

**1826 – Riemann**

**1831 – Maxwell**

CONCURRENT:

**1844 – Boltzmann**

1845 – Cantor

**1849 – Klein**

**1853 – Lorentz**

1853 – Ricci-Curbastro

**1862 – Hilbert**

1867 – Curie

**1872 – Russell**

**1879 – Einstein**

**1864 – Minkowski**

SUBSEQUENT:

**1882 – Noether**

**1924 – Mandelbrot**

1930 – Smale

1943 – Hamilton (Richard)

1951 – Freedman

1966 – Perelman