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Metric regularity of semi-infinite constraint systems

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Abstract

We obtain a formula for the modulus of metric regularity of a mapping defined by a semi-infinite system of equalities and inequalities. Based on this formula, we prove a theorem of Eckart-Young type for such set-valued infinite-dimensional mappings: given a metrically regular mapping F of this kind, the infimum of the norm of a linear function g such that F+g is not metrically regular is equal to the reciprocal to the modulus of regularity of F. The Lyusternik-Graves theorem gives a straightforward extension of these results to nonlinear systems. We also discuss the distance to infeasibility for homogeneous semi-infinite linear inequality systems.

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Correspondence to A.L. Dontchev.

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Dedicated to R. T. Rockafellar on his 70th Birthday

Research partially supported by grants BFM2002-04114-C02 (01-02) from MCYT (Spain) and FEDER (E.U.), GV04B-648 and GRUPOS04/79 from Generalitat Valenciana (Spain), and Bancaja-UMH (Spain).

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Cánovas, M., Dontchev, A., López, M. et al. Metric regularity of semi-infinite constraint systems. Math. Program. 104, 329–346 (2005). https://doi.org/10.1007/s10107-005-0618-z

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  • DOI: https://doi.org/10.1007/s10107-005-0618-z

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