Wednesday, 18 April 2001
2:30 - 4:00   Jeff Egger
The L-prime Ideal Theorem, and its Corollaries
Location: BH 920

The completeness theorem for coherent propositional logic, alias the Prime Ideal Theorem (PIT) for distributive lattices, is true in certain non-boolean toposes. But it is only strong enough to prove the Order Extension Principle (OEP) for decidable objects.
We introduce an extension of coherent propositional logic whose completeness theorem is stronger than (PIT). In particular, it is strong enough to conclude (OEP) for arbitrary objects.
This is the second in a series of talks concerning the axiom of choice for (Kuratowski-)finite sets and ``related issues''.