Add a generic implicit solver for non-linear diffusion #125
Description
The solver could be reused for implementing marine transport / erosion (see https://doi.org/10.1016/j.epsl.2019.115728) or other processes.
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The solver could be reused for implementing marine transport / erosion (see https://doi.org/10.1016/j.epsl.2019.115728) or other processes.