12
Views
5
CrossRef citations to date
0
Altmetric
Original Articles

The lattice of semiretracts of a free monoid

&
Pages 127-131 | Received 08 Apr 1991, Published online: 19 Mar 2007

References

  • Engelfriet , J. and Rozenberg , G. 1979 . Equality languages and fixed point languages . Information and Control , 43 : 20 – 49 .
  • Forys , W. and Head , T. 1991 . Retracts of free monoids are nowhere dense with respect to finite group topologies and p-adic topologies . Semigroup Forum , 42 : 117 – 119 .
  • Forys , W. and Head , T. 1990 . The poset of retracts of a free monoid . Intern. J. Computer Math. , 37 : 45 – 48 .
  • Head , T. 1982 . Expanded subalphabets in the theories of languages and semigroups . Intern. J. Computer Math. , 12 : 113 – 123 .
  • Lallement , G. 1979 . Semigroups and Combinatorial Applications , New York : John Wiley & Sons .
  • Tilson , B. 1972 . The intersection of free submonoids of a free monoid is free . Semigroup Forum , 4 : 345 – 350 .

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.