Pinkus A.Z., Winitzki S., Niesen J. The Yacas Book of Algorithms

2011. - 71 p.GNU Free Documentation License.
Yacas -Yet Another Computer Algebra System (Free Software Foundation).
This book is a detailed description of the algorithms used in the Yacas system for exact symbolic and arbitrary-precision numerical computations. Very few of these algorithms are new, and most are well-known. The goal of this book is to become a compendium of all relevant issues of design and implementation of these algorithms.