define the equivalence relationship S to the group
A= {1,2,…….,100} as S= {a,b) | [ 7/a = [7/b ] }
How many different valence groups result from the valence relationship?
NOTE: [ x ] is the integer value of x and is equal to the largest integer less than
or equal to x
Such [2.9]= 2,[2.1] = 2[8]=8
