Possible Duplicate:
distribution of reals corresponding to set
given S set of natural number ,the corresponding real in interval (0,1] of S can be regarded the continued fraction $1/(a_0+1/(a_1+...))$ where the $a_i$ are the elements of S in increasing order .using the uniform measure on subsets of N:how about the measure of the reals of the reals if S is productive set?.How about the measure of the reals if S is immune set?How the measure of the reals of the reals if S is neither immune set nor productive set nor c.e.set?
