The Magma Algebra System I: The User Language

@article{Bosma1997TheMA,
  title={The Magma Algebra System I: The User Language},
  author={Wieb Bosma and John J. Cannon and Catherine Playoust},
  journal={J. Symb. Comput.},
  year={1997},
  volume={24},
  pages={235-265}
}
Abstract In the first of two papers on MAGMA , a new system for computational algebra, we present the MAGMA language, outline the design principles and theoretical background, and indicate its scope and use. Particular attention is given to the constructors for structures, maps, and sets. 
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Algebraic Programming with Magma: The Categories
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