We obtain some classical characterizations of metric regularity and subregularity in a new and unified way using results for transversality and subtransversality from a recent paper by S. Apostolov, M. Bivas, and N. Ribarska [Characterizations of some transversality-type properties, Set-Valued Var. Analysis 30/3 (2022), art.no. 1041-1060] and the equivalence between (sub)transversality and (sub)regularity.

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Mira Bivas

(1) Faculty of Mathematics and Informatics, Sofia University, Sofia, Bulgaria
(2) Institute of Mathematics and Informatics, Bulgarian Academy of Sciences,
Sofia, Bulgaria

mira.bivas@math.bas.bg
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S. Apostolov, M. Bivas. “Characterizations of Metric (Sub)Regularity via (Sub)Transversality.” Journal of Convex Analysis 32 (2025), No. 4, 1241–1254. https://doi.org/10.68381/jca32065