• Carsten Gräser's avatar
    Add support for regularizing truncated diagonal entries · 01dedb7e
    Carsten Gräser authored
    This adds support for regularization of truncated diagonal
    entries in `BoxConstrainedQuadraticFunctionalConstrainedLinearization`
    If this is enabled, diagonal entries of truncated rows are set
    to 1. In case of nested matrices this is applied recusively,
    such that only the truncated scalar diagonal entries of nontrivial
    diagonal blocks are modified. This can be handy if the truncated
    linearized problem should be treated by a linear solver.
    By default this is disabled, such that linear solvers for the
    linearized problem have to be robust with respect to singular
    problems due to truncation.