It is by logic we prove, it is by intuition that we invent. - henri poincaré http://www-history.mcs.st-and.ac.uk/Biographies/Poincare.html http://www-history.m

It is by logic we prove, it is by intuition that we invent. - henri poincaré http://www-history.mcs.st-and.ac.uk/Biographies/Poincare.html http://www-history.mcs.st-and.ac.uk/Biographies/Poincare.htm...