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On the undecidability of the freeness of matrix semigroups

Julien Cassaigne, Tero Harju, Juhani Karhumäki, On the undecidability of the freeness of matrix semigroups. Int. J. Alg & Comp. , 1999.

BibTeX entry:

@ARTICLE{jCaHaKa99a,
  title = {On the undecidability of the freeness of matrix semigroups},
  author = {Cassaigne, Julien and Harju, Tero and Karhumäki, Juhani},
  journal = {Int. J. Alg & Comp.},
  year = {1999},
}

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