中文

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 ϕ\phi: Con K \to S be a {∨, 0}-homomorphism. Then ϕ\phi is, up to isomorphism, of the form Conc f, for a lattice L and a lattice homomorphism f : K \to 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}
}