For any positive integer N, we denote the exact exponent of2inNbyord2(N),and the product of all prime factors of N by rad(N).In what follows,we put A ∈{a,c},∈{1,−1}.
For any positive integer N, we denote the exact exponent of2inNbyord2(N),and the product of all prime factors of N by rad(N).In what follows,we putA ∈{a,c},∈{1,−1}.