Error estimates and comparison of quasi-boundary value, modified quasi-boundary, and Fourier truncation methods for recovering initial data in a time-fractional fourth-order PDE, showing equivalent rates, no saturation for FTM, and order optimality.
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On backward problem for a time-fractional fourth order parabolic equation
Error estimates and comparison of quasi-boundary value, modified quasi-boundary, and Fourier truncation methods for recovering initial data in a time-fractional fourth-order PDE, showing equivalent rates, no saturation for FTM, and order optimality.