: Oui? :                  :         :
   _______          `v-----'                  : CORNED  :
  :  Nee! :      (__)                         :  BEEF   :
  `------v'      (oo)                         :_________:
          /-------\/
         / :     ::                 An exercise found in a text book of quantum
        *  ::----::                 mechanics: "solve the Schrodinger equation
           ^^    ^^                 of a cow in a box. Please, pay attention on
                                    the boundary conditions!"
         Belgian Cow