TY - GEN AU - Carasso, Alfred S C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2011-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.7783 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2011 TI - Reconstructing the past from imprecise knowledge of the present ::some examples of non uniqueness in solving parabolic equations backward in time ER -