On compact classes of models
On countably compact reduced products, III
On countably universal Boolean algebras compact classes of models
On generalized products preserving compactness.
On generalized projective classes
On Helling cardinals
On Horn Theories.
On models of arithmetic having non-modular substructure lattices
On models with large automorphism groups.
On Models with Undefinable Elements.
On products of neat structures
On reductive and projective classes
On some conjectures connected with complete sentences
On some properties a projective model class passes on to the generated axiomatic class.
On stability and products
On the number of countable models of stable theories
We prove: Theorem. If T is a countable, complete, stable, first-order theory having an infinite set of constants with different interpretations, then I(T,ℵ₀) ≥ ℵ₀.
On the number of generic models