ACTA issues

Dual discriminator, revisited

Ervin Fried

Acta Sci. Math. (Szeged) 64:3-4(1998), 437-453

Abstract. The first part of the paper simplifies proofs of some basic theorems of the original paper [4]. The second part presents a general method for constructing dual discriminator varieties with $2^{\aleph_0}$ subvarieties, in contrast to the complicated single variety given in [1].

AMS Subject Classification (1991): 08B10, 08A30

Keyword(s): Varieties, filtrality, dual discriminators, definable principal congruences

Received August 15, 1995 and in revised form June 22, 1998. (Registered under 3298/2009.)