REFERENCES
- Araújo , I. , Ruskuc , N. , Silva , P. V. ( 2005 ). Presentations for inverse subsemigroups with finite complement , preprint, CMUP 2005-5 .
- Choffrut , C. ( 1993 ). Conjugacy in free inverse monoids . Internat. J. Algebra Comput. 3 : 169 – 188 . [CSA]
- Choffrut , C. , Harju , T. , Karhumäki , J. ( 1997 ). A note on decidability questions of word semigroups . Theoret. Comp. Sci. 183 : 83 – 92 . [CSA] [CROSSREF]
- Cohn , P. M. ( 1981 ). Universal Algebra . London : D. Reidel Publ. Co .
- Gluskin , L. M. ( 1957 ). Elementary generalized groups . Mat. Sb. N. S. 41 : 23 – 36 (Russian) . [CSA]
- Magnus , W. , Karrass , A. , Solitar , D. ( 1966 ). Combinatorial Group Theory: Presentations of Groups in Terms of Generators and Relations . New York : Wiley .
- Markov , A. A. (1971). On finitely generated subsemigroups of a free semigroup. Semigroup Forum 3:251–258. [CSA]
- Munn , W. D. ( 1974 ). Free inverse semigroups . Proc. London Math. Soc. 29 ( 3 ): 385 – 404 . [CSA]
- Petrich , M. ( 1984 ). Inverse Semigroups . New York : Wiley .
- Reilly , N. R. ( 1973 ). Free generators in free inverse semigroups . Bull. Austral. Math. Soc. 7 :407–424; Correction: ibid. 9: 479 . [CSA]
- Scheiblich , H. E. ( 1973 ). Free inverse semigroups . Proc. Amer. Math. Soc. 38 : 1 – 7 . [CSA]
- Silva , P. V. ( 2002 ). The homomorphism problem for the free monoid . Discrete Math. 259 : 189 – 200 . [CSA] [CROSSREF]
- Stephen , J. B. ( 1990 ). Presentations of inverse monoids . J. Pure Appl. Algebra 63 : 81 – 112 . [CSA] [CROSSREF]
- Communicated by D. Easdown.