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### GAP

GAP is a system for computational discrete algebra, with particular emphasis on Computational Group Theory. GAP provides a programming language, a library of thousands of functions implementing algebraic algorithms written in the GAP language as well as large data libraries of algebraic objects. GAP is used in research and teaching for studying groups and their representations, rings, vector spaces, algebras, combinatorial structures, and more. GAP is developed by international cooperation. The system, including source, is distributed freely under the terms of the GNU General Public License. You can study and easily modify or extend GAP for your special use. The current version is GAP 4, the older version GAP 3 is still available.

More information### Steenrod

Steenrod is a Maple package for doing computations in the mod 2 Steenrod algebra. It computes the product and coproduct of elements, converts between various bases, computes the action of the elements on polynomials, and does several other specialized calculations related to the mod 2 Steenrod algebra.

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