Henle J.M., Kleinberg E.M. Infinitesimal Calculus

New York: Dover Publication, 1979. — 144 Pages. — ( Books on Mathematics)
ISBN: 0486428869, 0262080974Introducing calculus at the basic level, this text covers hyperreal numbers and hyperreal line, continuous functions, integral and differential calculus, fundamental theorem, infinite sequences and series, infinite polynomials, topology of the real line, and standard calculus and sequences of functions. Only high school mathematics needed.