AN OPTIMAL CONTROL TOOL FOR COVID19
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HINTS FOR USERS

In the current version the time step needs to be 1 (day).
So, (in the "parameters and dimension" page from the bocop interface)
the horizon (final time) and number of steps must be equal.

About other values of the time step, see the discussion in the
appendix of the paper.

Note the "Hot start" option ("reuse" at bottom left of optimization
page of the bocop interface).

In case of difficulties of convergence, we advise to
solve first with a small horizon (e.g. 30 days), and then to
increase the horizon, taking advantage of the hot start option.

More generally for solving a given problem, it is often efficient
to solve a sequence of problems, starting from one already solved,
with small variations between two successive problems of the
sequence (the homotopy approach).

Due to the large number of states and coefficients, it can
be useful to have a tool for generating the data, namely
the files problem.def, problems.constants and problem.bounds.
See some resources in the python subdirectory of the bocop root.