There are Infinitely Many Countable Models of Strictly Stable Theories With no Dense Forking Chains
We define the class of thick cats (compact abstract theories, which contains in particular semi-Hausdorff, Hausdorff and first order cats), and prove that in this class simplicity behaves as in first order theories. We consider well-known first order notions, such as interpretability or stable dividing/reduct, and propose analogous notions that can be naturally expressed in terms of maps between type-space functors. We prove several desirable properties of the new notions and show the connection...
We study orthogonality, domination, weight, regular and minimal types in the contexts of rosy and super-rosy theories.
We introduce the notion of a weak generic type in a group. We improve our earlier results on countable coverings of groups and types.
We sort out to a large extent when a (first order complete theory) T has a superlimit model in a cardinal λ. Also we deal with related notions of being limit.