Dudek, J. Medial groupoids and Mersenne numbers. (English) Zbl 0478.08012 Fundam. Math. 114, 109-112 (1981). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 08B15 Lattices of varieties 11A41 Primes Keywords:variety of idempotent commutative medial groupoids; minimal variety; Mersenne prime PDFBibTeX XMLCite \textit{J. Dudek}, Fundam. Math. 114, 109--112 (1981; Zbl 0478.08012) Full Text: DOI EuDML