Elementary Calculus: An Approach Using Infinitesimals by H. Jerome Keisler
Publisher: Bodgen & Quigley 2000
ISBN/ASIN: B0006YE5JW
Number of pages: 856
This is a calculus textbook at the college Freshman level based on Abraham Robinson's infinitesimals, which date from 1960. Robinson's modern infinitesimal approach puts the intuitive ideas of the founders of the calculus on a mathematically sound footing, and is easier for beginners to understand than the more common approach via limits.
Mathematics Analysis & Calculus Calculus