When this quantity is infinite, Vitali’s theorem states that the convergence of a sequence of functions implies the existence of uniformly absolutely continuous integrals. If A has a positive value for this quantity and an arbitrary subset B has a zero value for this quantity, then A is called an atom. This quantity for a countable (15[1])union of sets is less than or equal (15[1])to the sum of this quantity over each individual set (-5[1])due to the (15[1])property of (*) subadditivity. Functions involving this quantity are defined over sigma-algebras. It’s not cardinality, but this quantity is always zero for an empty set. (10[1])For any closed or open interval (10[1])from a to b, the Lebesgue form of this quantity is b minus a. For 10 points, name this quantity that yields the “size” of a set, (-5[1])examples of which include length, area, and volume. ■END■ (10[1]0[3])