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Original Articles

On the family of retracts of free monoids

Pages 31-36 | Received 20 Jul 1989, Published online: 19 Mar 2007

References

  • Borsuk , K. 1967 . Theory of Retract , Warsaw : PWN .
  • Forys W. A Theorem about Retractions on Free Monoids Prace Informatyczne UJ 1987
  • Head , T. 1982 . Expanded subalphabets in the theories of languages and semigroups . Intern. J. Computer Math. , 12
  • Herman , G. T. and Walker , A. 1979 . On the stability of some biological schemes with cellular interactions . Theor. Computer Sci. , 2
  • Lallement , G. 1979 . Semigroups and Combinatorial Applications , Wiley .
  • Tarski , A. 1955 . A lattice-theoretic fixpoint theorem and its applications . Pacific J. Math. , 5
  • Van Leeuwen , J. 1975 . On the fixed points of monogenic functions in free monoids . Semigroup Forum , 10

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