... Robert, who did most of the typing, and mywife, Elaine, who did a great deal of the proofreading.• My students in Math 310 at the University of San Francisco, whotried out many of the exercises, ... their evenness or oddness.ContentsPreface to the Third Edition viiPreface to the Second Edition ixPreface to the First Edition xi1 The Theorem of Pythagoras 11.1 Arithmetic and Geometry 21.2 ... theinterpretation of a2, b2,andc2as squares on the sides of a right-angledtriangle with sides a, b, and hypotenuse c. The infinity stream begins withthe discovery that√2, the hypotenuse of the...