ORDERED CATEGORIES AND ORDERED SEMIGROUPS

REFERENCES

• Almeida , J. and Weil , P. 1998 . Profinite Categories and Semidirect Products . J. Pure and Applied Algebra , 123 : 1 – 50 .
   Web of Science ®Google Scholar
• Eilenberg , S. 1976 . Automata, Languages and Machines Vol. B. , New York : Academic Press .
   Google Scholar
• Jones , P.R. and Pustejovsky , S. 1992 . “ A Kernel for Relational Morphisms of Categories ” . In Semigroups with Application Edited by: Howie , J.M. , Munn , W.D. and Weinert , H.J. 152 – 161 . Singapore : World Scientific .
   Google Scholar
• Knast , R. 1983 . A Semigroup Characterization of Dot-depth One Languages . RAIRO Inform. Théor. , 17 : 321 – 330 .
   Web of Science ®Google Scholar
• Knast , R. 1983 . Some Theorems on Graph Congruences . RAIRO Inform. The´or. , 17 : 331 – 342 .
   Web of Science ®Google Scholar
• Margolis , S. and Pin , J.-E. 1987 . Inverse Semigroups and Extensions of Groups by Semilattices . J. Algebra , 110 : 277 – 297 .
   Web of Science ®Google Scholar
• Nico , W.R. 1983 . Wreath Products and Extensions . Houston J. Math , 9 : 71 – 99 .
   Web of Science ®Google Scholar
• Pin , J.-E. 1995 . A Variety Theorem Without Complementation . Izvestiya VUZ Matematika , 39 : 80 – 90 . English Version, Russian Mathem. (Iz. VUZ) 1995, 39, 74–83.
   Google Scholar
• Pin , J.-E. and Weil , P. 1997 . Polynomial Closure and Unambiguous Products . Theory of Computing Systems , 30 : 383 – 422 .
   Web of Science ®Google Scholar
• Pin , J.-E. and Weil , P. 2002 . Semidirect Product of Ordered Semigroups . Communications in Algebra , 30 : 149 – 169 .
   Web of Science ®Google Scholar
• Pin , J.-E. and Weil , P. 2002 . The Wreath Product Principle for Ordered Semigroups . Communications in Algebra , 30 : 5677 – 5713 .
   Web of Science ®Google Scholar
• Rey , J.-F. 1997 . The Block Product of Categories and Tilson's Division . Fundamenta Informaticæ , 31 : 379 – 400 .
   Google Scholar
• Rey , J.-F. 1997 . The Kernel of a Relational Morphism of Categories . Fundamenta Informaticæ , 31 : 401 – 402 .
   Google Scholar
• Rey , J.-F. 1999 . The Block Product of C-Varieties, Comparing Approaches . International Journal of Algebra and Computation , 9 : 79 – 98 .
   Web of Science ®Google Scholar
• Straubing , H. 1985 . Finite Semigroup Varieties of the Form V*D . J. Pure Appl. Algebra , 36 : 205 – 215 .
   Web of Science ®Google Scholar
• Teixeira, M. L. Estudo Do Produto Semidirecto De Pseudovariedades, Ph. D. Dissertation, Universidade do Porto, 1998.
   Google Scholar
• Thérien , D. and Weiss , A. 1985 . Graph Congruences and Wreath Products . J. Pure Appl. Algebra , 36 : 205 – 215 .
   Web of Science ®Google Scholar
• Thérien , D. 1988 . Catégories et Langages de Dot-Depth un . Inform. Théor. Appl. , 22 : 437 – 445 .
   Web of Science ®Google Scholar
• Tilson , B. 1976 . “ Complexity of Semigroups and Morphisms ” . In Automata, Languages and Machines Edited by: Eilenberg , S. Vol. B , Academic Press . Chap. XII.
   Google Scholar
• Tilson , B. 1987 . Categories as Algebras . J. Pure Appl. Algebra , 48 : 83 – 198 .
   Web of Science ®Google Scholar
• Work supported by the INTAS project 1224
   Google Scholar