petsc-3.14.0 2020-09-29
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All at once approach to sensitivity tracking
ex20td.c
Performs adjoint sensitivity analysis for a van der Pol like
equation with time dependent parameters using two approaches :
track : track only local sensitivities at each adjoint step
and accumulate them in a global array
global : track parameters at all timesteps together
Choose one of the two at runtime by -sa_method {track,global}.