Kopecek, Oldrich; Novotny, Miroslav On some invariants of unary algebras. (English) Zbl 0333.08004 Czech. Math. J. 24(99), 219-246 (1974). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 08Axx Algebraic structures PDFBibTeX XMLCite \textit{O. Kopecek} and \textit{M. Novotny}, Czech. Math. J. 24(99), 219--246 (1974; Zbl 0333.08004) Full Text: EuDML References: [1] M. Novotný: O jednom problému z teorie zobrazení. Publ. Fac. Sci. Univ. Masaryk, No 344 (1953), 53-64. [2] M. Novotný: Über Abbildungen von Mengen. Pac. Journ. Math. 13 (1963), 1359-1369. · Zbl 0137.25304 · doi:10.2140/pjm.1963.13.1359 [3] F. Hausdorff: Mengenlehre. Leipzig, 1914. · JFM 45.0123.01 [4] W. Sierpinski: Cardinal and ordinal numbers. Warszawa, 1958. · Zbl 0083.26803 This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.