Koganov, L. M. Remarks concerning the work on Möbius functions and Frobenius constants for a certain class of semigroups. (Russian) Zbl 0791.20073 Studies on semigroups, Interuniv. Collect. Sci. Works, Leningrad, 40-45 (1990). MSC: 20M15 20M05 11A25 PDF BibTeX XML
Koganov, L. M. On the Möbius functions and Frobenius constants of semigroups generated by linear forms of a special form. (Russian) Zbl 0675.20053 Semigroups and partial groupoids, Interuniv. Collect. Sci. Works, 15-25 (1987). Reviewer: M.Ştefănescu MSC: 20M15 11A25 20M05 PDF BibTeX XML
Koganov, L. M. Combinatorial proof of Deddens’ theorem. (Russian) Zbl 0615.10004 Algebraic systems with one operation and one relation, Interuniv. Collect. sci. Works, Leningrad 1985, 46-53 (1985). Reviewer: B.Pondeliček MSC: 11A07 11A25 06F05 PDF BibTeX XML