The $3x+1$ problem, or Collatz problem, concerns the following seemingly innocent arithmetic procedure applied to integers: If an integer $x$ is odd then “mul

The purpose of this book is to teach the basic principles of problem solving, including both mathematical and nonmathematical problems. This book will help stud

This lively, problem-oriented text, first published in 2004, is designed to coach readers toward mastery of the most fundamental mathematical inequalities. With

A young poet's tragicomic account of crossed loves and rebellions as he grows from boy to man under the vigilant eyes of the secret police and the State as a wh

Change initiatives fail because humans are hardwired to return to what's worked for us in the past. This book offers a straightforward process for rewiring ours