Mathematicians born on this day:
1659 : David Gregory |
Mathematicians who died on this day:
1903 : Gegenbauer |

Heinz Hopf | David Gregory | Vladimir Arnold |

**Vladimir Arnold** (1937 - 2010)

All mathematics is divided into three parts:
cryptography (paid for by CIA, KGB and the like), hydrodynamics (supported by manufacturers of atomic submarines) and celestial mechanics (financed by military and other institutions dealing with missiles, such as NASA).

Cryptography has generated number theory, algebraic geometry over finite fields, algebra, combinatorics and computers.

Hydrodynamics procreated complex analysis, partial differential equations, Lie groups and algebra theory, cohomology theory and scientific computing.

Celestial mechanics is the origin of dynamical systems, linear algebra, topology, variational calculus and symplectic geometry.

The existence of mysterious relations between all these different domains is the most striking and delightful feature of mathematics (having no rational explanation).

*Polymathematics: Is mathematics a single science or a set of arts? *in *Mathematics: Frontiers and Perspectives* (AMS 1999)

JOC/EFR April 2015
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School of Mathematics and Statistics University of St Andrews, Scotland | |

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