Abstract. We survey eleven papers by György Pollák published from 1973 to 1989 and devoted to various aspects of the theory of semigroup varieties: hereditarily finitely based varieties, permutation identities, covers in varietal lattices.
AMS Subject Classification
(1991): 20M07, 08B05, 08B15
Received February 18, 2002. (Registered under 2824/2009.)
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