A characterization of tangential regularity

DOI10.1016/0362-546X(81)90079-1zbMath0472.58010MaRDI QIDQ3925580

Jean-Paul Penot

Publication date: 1981

Published in: Nonlinear Analysis: Theory, Methods & Applications (Search for Journal in Brave)

zbMATH Keywords

best approximationtangential regularitymetric tangent conecontinuous vector fieldsstrict tangent coneperitangent coneconvex tangent conelimit inferior of the contingent conetangent cones to a subset of a Banach space

Mathematics Subject Classification ID

Best approximation, Chebyshev systems (41A50) Uniqueness of best approximation (41A52) Differentiation theory (Gateaux, Fréchet, etc.) on manifolds (58C20) Variational problems in infinite-dimensional spaces (58E99) Optimality conditions (49K99)

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