The Weekly Mitzva - Beshalach, The Mitzva of Hallel, by Rav Yair Kahn

The shiur begins with the argument between the Rambam and Ramban, whether hallel is a Torah obligation or a rabbinic one. In the course of the discussion, there is an attempt to clarify the criterion that generate the obligation to recite hallel and to define the precise definition of that obligation