TY - JOUR AU - Friedman, Avner AU - Herrero, Miguel A. PY - 1987 DO - 10.1016/0022-247X(87)90013-8 SN - 0022-247X UR - https://hdl.handle.net/20.500.14352/57783 T2 - Journal of Mathematical Analysis and Applications AB - Consider the initial-boundary value problem for ut=Δu-λu(q) with λ>0, 0