SAGE is open source mathematics software which creates a viable free open source alternative to Magma, Maple, Mathematica, and Matlab. 
<ul> 
	<li>General and Advanced Pure and Applied Mathematics. - Use SAGE for studying a huge range of mathematics, including algebra, calculus, elementary to very advanced number theory, cryptography, numerical computation, commutative algebra, group theory, combinatorics, graph theory, and exact linear algebra.</li> 
	<li>Use an Open Source Alternative. - By using SAGE you help to support a viable open source alternative to Magma, Maple, Mathematica, and MATLAB. SAGE includes many high-quality open source math packages.</li> 
	<li>Use Most Mathematics Software from Within SAGE. - SAGE makes it easy for you to use most mathematics software together. SAGE includes interfaces to Magma, Maple, Mathematica, MATLAB, and MuPAD, and the free programs Axiom, GAP, GP/PARI, Macaulay2, Maxima, Octave, and Singular.</li> 
	<li>Use a Standard Programming Language. - You work with SAGE using the highly regarded scripting language Python instead of an obscure language designed for a particular mathematics program. You can write programs that combine serious mathematics with anything else.</li> 
</ul>

William Stein (University of Washington)

Absolutely Free

SAGE

Open-source advanced mathematics software.

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sage

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SAGE: 9.8