Unsolvable one-dimensional lifting problems for congruence lattices of lattices
综合数学
2007-05-23 v1
摘要
Let S be a distributive {∨, 0}-semilattice. In a previous paper, the second author proved the following result: Suppose that S is a lattice. Let K be a lattice, let : Con K S be a {∨, 0}-homomorphism. Then is, up to isomorphism, of the form Conc f, for a lattice L and a lattice homomorphism f : K L. In the statement above, Conc K denotes as usual the {∨, 0}-semilattice of all finitely generated congruences of K. We prove here that this statement characterizes S being a lattice.
引用
@article{arxiv.math/0501377,
title = {Unsolvable one-dimensional lifting problems for congruence lattices of lattices},
author = {Jiri Tuma and Friedrich Wehrung},
journal= {arXiv preprint arXiv:math/0501377},
year = {2007}
}