Now we view the solutions of (1.1) in the plane as a set of lattice points on a lines Lk defined by Lk: ax−by = c + kp where k ∈ Z.
If Lk is such a line, then the next line to the right is Lk+d defined by Lk+d : ax − by = c + kp + dp, where d = (a,b).
The horizontal distance H between the lines Lk and Lk+d is H = dp a , the horizontal distance between solutions on the line Lk is h = b d , and the vertical distance v is v = a d