Torsten Bosse

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We address the problem of minimizing objectives from the class of piece-wise differentiable functions whose nonsmoothness can be encapsulated in the absolute value function. They possess local piecewise linear approximations with a discrepancy that can be bounded by a quadratic proximal term. This overestimating local model is continuous but generally(More)
Multigrid methods have been shown to be an efficient tool for solving partial differential equations. In this paper, the idea of a multi-grid method for nonsmooth problems is presented based on techniques from piecewise linear differentiation. In detail, the original nonsmooth problem is approximated by a sequence of piecewise linear models, which can be(More)
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