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math.CT2016
Amalgamable diagram shapes
Ruiyuan Chen
A category has the amalgamation property (AP) if every pushout diagram has a cocone, and the joint embedding property (JEP) if every finite coproduct diagram has a cocone. We show…
math.LO2016★ 1 cited
Structurable equivalence relations
Ruiyuan Chen, Alexander S. Kechris
For a class of countable relational structures, a countable Borel equivalence relation is said to be -structurable if there is a Borel way to put a str…