Laxton introduced a group structure on the set of equivalence classes of linear recurrence sequences of degree 2. This result yields much information on the divisibilities of such sequences. In this ...

Equivalence‐based instruction (EBI) is an instructional methodology grounded in the principles of stimulus equivalence, whereby teaching a limited set of direct relations gives rise to the emergence ...

Let $R$ be a Borel equivalence relation with countable equivalence classes, on the standard Borel space $(X, \mathscr{A}, \mu)$. Let $\sigma$ be a 2-cohomology class ...