gar­rigues – Meta­Post macros for the re­pro­duc­tion of Gar­rigues' Easter nomo­gram

Me­ta­post macros for the re­pro­duc­tion of Gar­rigues' Easter nomo­gram. Th­ese macros are de­scribed in
De­nis Roegel: An in­tro­duc­tion to nomog­ra­phy: Gar­rigues' nomo­gram for the com­pu­ta­tion of Easter, TUGboat (vol­ume 30, num­ber 1, 2009, pages 88-104)