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 ...

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 ...

The methods of cross-ratios, equivalence classes and metrics that were introduced in a previous paper (Altham 1970) are extended to three further problems. First the interdependence of the rows, ...