The pseudovariety of semigroups of triangular matrices over a finite field
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 39 (2005) no. 1, pp. 31-48.

We show that semigroups representable by triangular matrices over a fixed finite field form a decidable pseudovariety and provide a finite pseudoidentity basis for it.

DOI : 10.1051/ita:2005002
Classification : 20M07, 20M030 
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     author = {Almeida, Jorge and Margolis, Stuart W. and Volkov, Mikhail V.},
     title = {The pseudovariety of semigroups of triangular matrices over a finite field},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {31--48},
     publisher = {EDP-Sciences},
     volume = {39},
     number = {1},
     year = {2005},
     doi = {10.1051/ita:2005002},
     mrnumber = {2132577},
     zbl = {1086.20029},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ita:2005002/}
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Almeida, Jorge; Margolis, Stuart W.; Volkov, Mikhail V. The pseudovariety of semigroups of triangular matrices over a finite field. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 39 (2005) no. 1, pp. 31-48. doi : 10.1051/ita:2005002. http://archive.numdam.org/articles/10.1051/ita:2005002/

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