Yakymenko, D. Yu. Decomposition of a unitary scalar operator into a product of roots of the identity. (English) Zbl 1289.47035 Methods Funct. Anal. Topol. 19, No. 2, 191-196 (2013). Reviewer: Anatoly N. Kochubei (Kyïv) MSC: 47A62 20F10 68Q42 PDF BibTeX XML Cite \textit{D. Yu. Yakymenko}, Methods Funct. Anal. Topol. 19, No. 2, 191--196 (2013; Zbl 1289.47035) OpenURL
De Luca, Aldo; Varricchio, Stefano Finiteness and regularity in semigroups and formal languages. (English) Zbl 0935.68056 EATCS Monographs on Theoretical Computer Science. Berlin: Springer. x, 240 p. (1999). Reviewer: S.Gerber (Leipzig) MSC: 68Q45 68R15 68-02 68Q42 PDF BibTeX XML Cite \textit{A. De Luca} and \textit{S. Varricchio}, Finiteness and regularity in semigroups and formal languages. Berlin: Springer (1999; Zbl 0935.68056) OpenURL
Siekman, J.; Szabo, P. Universal unification and a classification of equational theories. (Russian) Zbl 0564.68062 Kibern. Sb., Nov. Ser. 21, 213-234 (1984). MSC: 68T15 03C05 08B05 03B35 08A45 PDF BibTeX XML Cite \textit{J. Siekman} and \textit{P. Szabo}, Kibern. Sb., Nov. Ser. 21, 213--234 (1984; Zbl 0564.68062) OpenURL
Siekman, J.; Szabo, P. Universal unification and a classification of equational theories. (English) Zbl 0494.68087 Automated deduction, 6th Conf., New York 1982, Lect. Notes Comput. Sci. 138, 369-389 (1982). MSC: 68T15 08A45 08B05 03C05 03B35 PDF BibTeX XML OpenURL