期刊
SET-VALUED ANALYSIS
卷 12, 期 1-2, 页码 79-109出版社
SPRINGER
DOI: 10.1023/B:SVAN.0000023394.19482.30
关键词
conditioning; metric regularity; subregularity; strong regularity; strong subregularity; radius of regularity; distance to ill-posedness; solution mappings; inverse mapping theorems; graphical derivatives; Lipschitz properties; calmness; nonlinear Eckart-Young theorems
Concepts of conditioning have long been important in numerical work on solving systems of equations, but in recent years attempts have been made to extend them to feasibility conditions, optimality conditions, complementarity conditions and variational inequalities, all of which can be posed as solving 'generalized equations' for set-valued mappings. Here, the conditioning of such generalized equations is systematically organized around four key notions: metric regularity, subregularity, strong regularity and strong subregularity. Various properties and characterizations already known for metric regularity itself are extended to strong regularity and strong subregularity, but metric subregularity, although widely considered, is shown to be too fragile to support stability results such as a radius of good behavior modeled on the Eckart - Young theorem.
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