The classic "Handbook of Mathematical Functions", edited by Milton Abramowitz and Irene Stegun, now available on your iPhone or iPad.
Over 4000 equations and 170 graphs available at the flick of your finger. Perfect for students, scientists, engineers and even supermodels who can't quite remember how that recurrence relation for Legendre polynomials goes.
Bulky and obsolete tables have been removed, and in some cases replaced with interactive calculators-- Binomial coefficients, Stirling numbers and much more.
Comprehensive menus make finding right section quick and easy.