Mathematics is not a separate entity. It owes a great deal of its power and its beauty to other disciplines.

- Mark Kac

To exist (in mathematics), said Henri Poincaré, is to be free from contradiction. But mere existence does not guarantee survival. To survive in mathe…

- Mark Kac

In recent years we have become much more preoccupied with streamlining and organizing our subject than with maintaining its overall vitality. If we a…

- Mark Kac

A proof is that which convinces a reasonable man; a rigorous proof is that which convinces an unreasonable man.

- Mark Kac

There are surely worse things than being wrong, and being dull and pedantic are surely among them.

- Mark Kac

... there are those who believe that mathematics can sustain itself and grow without any further contact with anything outside itself, and those who …

- Mark Kac