Hadamard Jacques. The Psychology of Invention in the Mathematical Field

Princeton University Press. 1954. — 145 p. — ISBN: 0486201074Thoughtful and articulate study of the origin of ideas. Role of the unconscious in invention; the medium of ideas — do they come to mind in words? in pictures? in mathematical terms? Much more. "It is essential for the mathematician, and the layman will find it good reading.