Zero is the number of objects that satisfy a condition that is never satisfied. But as never means "in no case", I… — Henri Poincare Copy Share Image
Guessing before proving! Need I remind you that it is so that all important discoveries have been made? — Henri Poincare Copy Share Image
All the scientist creates in a fact is the language in which he enunciates it. If he predicts a fact, he will… — Henri Poincare Copy Share Image
All that we can hope from these inspirations, which are the fruits of unconscious work, is to obtain points of departure for… — Henri Poincare Copy Share Image
It is often said that experiments should be made without preconceived ideas. That is impossible. Not only would it make every experiment… — Henri Poincare Copy Share Image
The mathematical facts worthy of being studied are those which, by their analogy with other facts, are capable of leading us to the knowledge… — Henri Poincare Copy Share Image
. . . by natural selection our mind has adapted itself to the conditions of the external world. It has adopted the geometry most… — Henri Poincare Copy Share Image
If we knew exactly the laws of nature and the situation of the universe at the initial moment, we could predict exactly the situation… — Henri Poincare Copy Share Image
Absolute space, that is to say, the mark to which it would be necessary to refer the earth to know whether it really moves,… — Henri Poincare Copy Share Image
Absolute space, that is to say, the mark to which it would be necessary to refer the earth to know whether it really moves,… — Henri Poincare Copy Share Image
A cat is witty, he has nerve, he knows how to do precisely the right thing at the right moment. — Henri Poincare Copy Share Image
In the old days when people invented a new function they had something useful in mind. — Henri Poincare Copy Share Image
Mathematics has a threefold purpose. It must provide an instrument for the study of nature. But this is not all: it has a philosophical… — Henri Poincare Copy Share Image
