A new system of coordinates for the tilings $\{p,3\}$ and   $\{p$$-$$2,4\}$
  In this paper, we indicate a new way to define coordinates for the tiles of the tilings $\{p,3\}$ and $\{p$$-$$2,4\}$ where the natural number $p$ satisfies $p\geq 7$. 
Maurice Margenstern
cs.CG