The Isis problem, which has a link with the Isis cult of ancient Egypt, asks: “Find which rectangles with sides of integral length (in some unit) have area and perimeter (numerically) equal, and prove the result.” Since the solution requires minimal technical mathematics, the problem is...

In formal analysis of collective action, usually attention is focused on problems arising in aggregating the separate orderings into coherent collective results. Our concern is not with the aggregation problem. Instead, our focus is on the particular characteristics of the alternatives...