**Elementary Calculus: An Approach Using Infinitesimals**

by H. Jerome Keisler

**Publisher**: Bodgen & Quigley 2012**ISBN/ASIN**: B0006YE5JW**Number of pages**: 992

**Description**:

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.

Download or read it online for free here:

**Download link**

(22MB, PDF)

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