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Semivarieties and Schreier varieties of unary algebras
A. I. Budkin Novosibirsk State University
Abstract:
A correction is provided for one result of a paper by Shafaat [1], and it is proven that the set of Schreier varieties of algebras $\left<A;{}^+1\right>$ with two unary operations has the cardinality of the continuum.
Citation:
A. I. Budkin, “Semivarieties and Schreier varieties of unary algebras”, Mat. Zametki, 15:2 (1974), 263–270; Math. Notes, 15:2 (1974), 150–154
Linking options:
https://www.mathnet.ru/eng/mzm7345 https://www.mathnet.ru/eng/mzm/v15/i2/p263
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