The Tschantz and the alvin higher conditions are equivalent in congruence distributive varieties
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DOI: 10.1007/s00012-020-00697-z
Abstract: We show that, under the assumption of congruence distributivity, a condition by S. Tschantz characterizing congruence modularity is equivalent to a variant of the classical Jonsson condition. Here equivalence is intended in a strong sense,… read more here.
Keywords: alvin higher; tschantz alvin; conditions equivalent; congruence ... See more keywords
Minimality Conditions Equivalent to the Finitude of Fermat and Mersenne Primes
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DOI: 10.3390/axioms12060540
Abstract: The question is still open as to whether there exist infinitely many Fermat primes or infinitely many composite Fermat numbers. The same question concerning Mersenne numbers is also unanswered. Extending some recent results of Megrelishvili… read more here.
Keywords: minimality conditions; mersenne primes; fermat primes; conditions equivalent ... See more keywords