The Rocky Mountain Journal of Mathematics, Vol. 22, No. 4 (FALL 1992), pp. 1341-1347 (7 pages) Let us say that the Borel sets of spaces X and Y multiply if each Borel set in the product space X × Y is ...
Mathematics often helps us to think about issues that don’t seem mathematical. One area that has surprisingly far-reaching applications is the theory of sets. Sets are one of the most basic objects in ...