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The backward beam method for solving a parabolic partial differential equation backward in time is studied. Time discretizations based on Padé approximations of the exponential function are considered, and a priori estimates of the step length are given, which guarantee an almost optimal error bound. The computational efficiency of different discretizations is discussed. Some numerical examples are given, which compare the backward beam method and the regularization method studied in Part I of this paper.

Time discretization in the backward solution of parabolic equations. II