=+25.16. For A 91 and T> 0, put A-(A) = A([-T, T](A)/2T, where is Lebesgue

=+25.16. For A € 91 and T> 0, put A-(A) = A([-T, T](A)/2T, where À is Lebesgue measure. The relative measure of A is

(25.17)

p(A)= lim A7(4), T+c provided that this limit exists. This is a continuous analogue of density (see