Q-universal varieties of bounded lattices

被引:3
作者
Adams, ME [1 ]
Dziobiak, W
机构
[1] SUNY Coll New Paltz, Dept Math, New Paltz, NY 12561 USA
[2] Univ Puerto Rico, Dept Math, Mayaguez, PR 00681 USA
关键词
quasivariety; variety; bounded lattices; lattice of quasivarieties; Q-universal;
D O I
10.1007/s000120200004
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
A quasivariety K of algebraic systems of finite type is said to be Q-universal if, for any quasivariety M of finite type, L(M) is a homomorphic image of a sublattice of L(K), where L(M) and L(K) are the lattices of quasivarieties contained in M and K, respectively. It is known that, for every variety K of (0, I)-lattices, if K contains a finite non-distributive simple (0, l)-lattice, then K is Q-universal, see [3]. The opposite implication is obviously true within varieties of modular (0, I)-lattices. This paper shows that in general the opposite implication is not true. A family (A(i) : i < 2(w)) of locally finite varieties of (0, I)-lattices is exhibited each of which contains no simple non-distributive (0, I)-lattice and each of which is Q-universal.
引用
收藏
页码:333 / 356
页数:24
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