RIVERAS FILE FOR DIVORCEWorld Famous PainterCOYOACAN, Mexico, (U.R)—The joint divorce petition of Diego Rivera, world famous painter, and: his wife, Frida Kahlo, was filed Thursday in civil court, which can grunt a decree wilhou a month.It will be Rivera’s third divorce and one, lie said, that would be “purely a matter of legal convenience in the spirit of modern times, since there has been no change in the magnificent relations between us and we are doing it in order to improve Frida's legal position.”