Computational Mathematics with SageMath (2018)

For high school students, Sage provides a wonderful scientific and graphical calculator. For graduate students, researchers and engineers, Sage provides the most recent algorithms and tools for many domains of mathematics. This book, written by researchers and teachers at different levels (high school, undergraduate, graduate) focuses on the underlying mathematics, which is necessary to efficiently use Sage.

Source: sagebook.gforge.inria.fr