### Homogeneous families and their automorphism groups

by Kojman and Shelah. [KjSh:499]

J London Math Soc, 1995

A homogeneous family of subsets over a given set is one
with a very ``rich'' automorphism group. We prove the existence
of a bi-universal element in the class of homogeneous families
over a given infinite set and give an explicit construction of
2^c isomorphism types of homogeneous families over a
countable set.

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