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