Tutorial Release 10.4 The Sage Development Team https://doc.sagemath.org/pdf/en/tutorial/sage_tutorial.pdf
Sage is free, open-source math software that supports research and teaching in algebra, geometry, number theory, cryptography, numerical computation, 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. The overall goal of Sage is to create a viable, free, open-source alternative to Maple, Mathematica, Magma, and MATLAB.
This tutorial is the best way to become familiar with Sage in only a few hours. You can read it in HTML or PDF versions, or from the Sage notebook (click Help, then click Tutorial to interactively work through the tutorial from within Sage).
This work is licensed under a Creative Commons Attribution-Share Alike 3.0 License.
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1.2 Ways to Use Sage
You can use Sage in several ways.
Notebook graphical interface: run
sage -n jupyter; see the Jupyter documentation on-line,Interactive command line: see The Interactive Shell,
Programs: By writing interpreted and compiled programs in Sage (see Loading and Attaching Sage files and Creating Compiled Code), and
Scripts: by writing stand-alone Python scripts that use the Sage library (see Standalone Python/Sage Scripts).