Support general rectangles with ALM and preconditioning #303
Description
Is your feature request related to a problem? Please describe.
Currently OpEn cannot apply preconditioning to ALM-type constraints when we have general rectangles. Currently the only type of constraints we support are C={0} and C=R^n_+.
Describe the solution you'd like
We should support rectangles as well.
Describe alternatives you've considered
We could modify F1(u; p) for the constraints to be of the form F(u; p) <= 0 (unless there is an easier alternative).
Additional context
None
Target version
Opengen v0.7.2