Refactoring low-level DFT+U
Description
Simplifying the logic of the DFT+U low-level code. This allows for DFT+U on full meshes for non-periodic system, and hence to use Löwdin orthogonalization for isolated systems.
News snippet
Simplifying the logic of the DFT+U low-level code.
Checklist
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I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.
Edited by Nicolas Tancogne-Dejean