On the Number of Elementary Submodels of an Unsuperstable Homogeneous Structure
by Hyttinen and Shelah. [HySh:632]
Math Logic Quarterly, 1998
We show that if M is a stable unsuperstable homogeneous
structure, then for most kappa < |M|, the number of elementary
submodels of M of power kappa is 2^kappa .
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