From Bi-ideals to Periodicity
Department of Mathematics, University of Latvia, Raiņa bulvāris 19, Rīga, 1586, Latvia; email@example.com; web site:
2 Institute of Electronics and Computer Science, Dzērbenes street 14, Rīga, 1006, Latvia; firstname.lastname@example.org
The necessary and sufficient conditions are extracted for periodicity of bi-ideals. They cover infinitely and finitely generated bi-ideals.
Mathematics Subject Classification: 68R15 / 94A55 / 68Q15
Key words: Periodic words / bi-ideals / the sequence generates the bi-ideal / finitely generated bi-ideals
© EDP Sciences, 2008