Henri Poincare Quotes & Sayings (Page 3)

“If one looks at the different problems of the integral calculus which arise naturally when one wishes to go deep into the different parts of physics, it is impossible not to be struck by the analogies existing.”

“In the old days when people invented a new function they had something useful in mind.”

“If that enabled us to predict the succeeding situation with the same approximation, that is all we require, and we should say that the phenomenon had been predicted, that it is governed by the laws.”

“Hypotheses are what we lack the least.”

“One would have to have completely forgotten the history of science so as to not remember that the desire to know nature has had the most constant and the happiest influence on the development of mathematics.”

“What is it indeed that gives us the feeling of elegance in a solution, in a demonstration?”

“Thus, they are free to replace some objects by others so long as the relations remain unchanged.”

“To invent is to discern, to choose.”

“Facts do not speak.”

“No more than these machines need the mathematician know what he does.”