%0 Journal Article
%T The possible values of critical points between varieties of lattices
%A Pierre Gillibert
%J Mathematics
%D 2010
%I arXiv
%R 10.1016/j.jalgebra.2012.04.006
%X We denote by Conc(L) the semilattice of all finitely generated congruences of a lattice L. For varieties (i.e., equational classes) V and W of lattices such that V is contained neither in W nor its dual, and such that every simple member of W contains a prime interval, we prove that there exists a bounded lattice A in V with at most aleph 2 elements such that Conc(A) is not isomorphic to Conc(B) for any B in W. The bound aleph 2 is optimal. As a corollary of our results, there are continuum many congruence classes of locally finite varieties of (bounded) modular lattices.
%U http://arxiv.org/abs/1003.5742v3