The Gift of Fear Top 100 Self Help authors. The Gift of Fear was selected for the book, 50 Psychology Classics. By finding patterns in stories of violence and abuse, de Becker seeks to highlight the inherent predictability of violence. The book explores various settings where violence may be found—the workplace, the home, the school, dating—and describes what de Becker calls pre-incident indicators (PINS). By noticing PINS (events and behaviors that often precede violence), individuals can better predict violence before it occurs, and therefore, take the necessary precautions and actions to stay safe. "The Gift of Fear" also describes de Becker’s MOSAIC Threat Assessment
Irrational number to show that π is irrational, whence it follows immediately that π is irrational also. The existence of transcendental numbers was first established by Liouville (1844, 1851). Later, Georg Cantor (1873) proved their existence by a different method, which showed that every interval in the reals contains transcendental numbers. Charles Hermite (1873) first proved "e" transcendental, and Ferdinand von Lindemann (1882), starting from Hermite's conclusions, showed the same for π. Lindemann's proof was much simplified by Weierstrass (1885), still further by David Hilbert (1893), and was finally made elementary by Adolf Hurwitz and Paul Gordan. The square root of 2