Congruence Lattice Problem - Schmidt's Approach Via Distributive Join-homomorphisms

Schmidt's Approach Via Distributive Join-homomorphisms

We say that a (∨,0)-semilattice satisfies Schmidt's Condition, if it is isomorphic to the quotient of a generalized Boolean semilattice B under some distributive join-congruence of B. One of the deepest results about representability of (∨,0)-semilattices is the following.

Theorem (Schmidt 1968). Any (∨,0)-semilattice satisfying Schmidt's Condition is representable.

This raised the following problem, stated in the same paper.

Read more about this topic:  Congruence Lattice Problem

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