00344nam a2200121Ia 4500082002000000100002600020245006600046260002900112300001200141490005900153500000500212700000500217  a515.35bM831.NT  aMorawetz, Cathleen S.  aNotes on time decay scattering for some hyperbolic problemsb  aPhiladelphiabSIAMc1975  av, 81p.  aRegional conference series in Applied Mathematicsv 19  a  a