This is the manual for the Sage mathematical software system. Sage is free open source math software that supports research and teaching in algebra, geometry, number theory, cryptography, and related areas. Both the Sage development model and the technology in Sage itself are distinguished by an extremely strong emphasis on openness, community, cooperation, and collaboration: we are building the car, not reinventing the wheel.

This reference manual contains many examples that illustrate the usage of Sage. The examples are all tested with each release of Sage, and should produce exactly the same output as in this manual, except for line breaks.

The Sage command line is briefly described in *The Sage Command Line*, which lists the command line options. For more
details about the command line, see the Sage tutorial.

The Sage graphical user interface is described in *The Sage Notebook*. This graphical user interface is unusual in
that it operates via your web browser. It provides you with Sage
worksheets that you can edit and evaluate, which contain scalable
typeset mathematics and beautiful antialiased images.

This work is licensed under a Creative Commons Attribution-Share Alike 3.0 License.

Enjoy Sage!