Essays on the Theory of Numbers by Richard Dedekind
Publisher: The Open Court Publishing 1901
ISBN/ASIN: 0486210103
Number of pages: 78
This is a book combining two essays by Dedekind: "Continuity and irrational numbers" - Dedekind's way of defining the real numbers from rational numbers; and "The nature and meaning of numbers" where Dedekind offers a precise explication of the natural numbers (using what are now called the Peano axioms, since Peano made so much of them after reading Dedekind).
Mathematics Pure Mathematics Number Theory