David Deutsch Mathematics Quotations
Mathematics Quotes from:
 All Mathematics Quotes
 Albert Einstein
 Bertrand Russell
 G H Hardy
 Henri Poincare
 Richard P Feynman
 E T Bell
 Georg Cantor
 James Newman
 Paul Erdos
 Andrew Wiles
 Benoit Mandelbrot
 Brian Greene
 Carl Friedrich Gauss
 Hermann Weyl
 Ludwig Wittgenstein
 Alfred North Whitehead
 Alvin E Roth
 Charles Sanders Peirce
 David Deutsch
 Eugene Wigner

Almost Quotes
The theory of computation has traditionally been studied almost entirely in the abstract, as a topic in pure mathematics. This is to miss the point of it. Computers are physical objects, and computations are physical processes. What computers can or cannot compute is determined by the laws of physics alone, and not by pure mathematics.