Infinitesimal Calculus - (Dover Books on Mathematics) by James M Henle & Eugene M Kleinberg (Paperback)

This book provides a rigorous undergraduate treatment of calculus at the basic level, covering topics such as hyperreal numbers, continuous functions, integral and differential calculus, fundamental theorem, infinite sequences and series, and more.

The text is written in a clear and concise manner, making it accessible to students with only a solid foundation in high school mathematics.

The book includes numerous figures and an appendix on standard calculus and sequences of functions, providing a comprehensive introduction to the subject.

Whether you're looking to gain a deeper understanding of calculus or simply want to improve your grades, this book is the perfect choice for anyone interested in learning calculus at the basic level.