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Geometric Approximation of Proximal Normals
Nonsmooth analysis distance function $\delta$-projection proximal normal proximal subdifferential
2009/2/5
For $x\in H\setminus S$ and $\delta \ge 0$, the $\delta$-projection of $x$ onto $S$, is the set $\operatorname{proj}_S^\delta(x):=\left\{s\in S \colon \|s-x\|^2 \le d_S(x)^2 + \delta^2 \right\}.$ We p...