Mathematicians born on this day:
1777 : Poinsot |
Mathematicians who died on this day:
1641 : Horrocks |

Zygmunt Janiszewski | Carle Runge | Louis Poinsot |

**Louis Poinsot** (1777 - 1859)

Everyone makes for himself a clear idea of the motion of a *point*, that is to say, of the motion of a corpuscle which one supposes to be infinitely small, and which one reduces by thought in some way to a mathematical point.

*Théorie nouvelle de la rotation des corps* (1834)

JOC/EFR April 2015
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