Note 406:7 — Chapter XII

Cf. Bertrand Russell: Principles of Mathematics, Vol. I. Among the more important writings of this movement are the following: Giuseppi Peano: Formulaire de Mathématique, published by the Rivista di matematica, Tom. I-IV. Richard Dedekind: Was sind und was sollen die Zahlen? Georg Cantor: Grundlagen einer allgemeinen Mannigfaltigkeitslehre. Louis Couturat: De l'Infini Mathématique, and articles in Revue de Metaphysique et de Morale. A. N. Whitehead: A Treatise on Universal Algebra. Heinrich Hertz: Die Prinzipien der Mechanik. Henri Poincaré: La Science et l'Hypothèse. For the bearing of these investigations on philosophy, see Royce: The Sciences of the Ideal, in Science, Vol. XX, No. 510.