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We introduce the Guignard constraint qualification (abbreviated as, (GCQ)) for (NSIP). Subsequently, by employing (GCQ), we establish the Karush-Kuhn-Tucker (abbreviated as, KKT) type necessary optimality conditions for (NSIP). Further, we derive that the Lagrangian function associated with a fixed Lagrange multiplier, corresponding to a known solution, remains constant on the solution set of (NSIP) under geodesic pseudoconvexity assumptions. Moreover, we derive certain characterizations of the solution set of the considered problem (NSIP) in the framework of Hadamard manifolds. We provide illustrative examples that highlight the importance of our established results. To the best of our knowledge, characterizations of the solution set of (NSIP) using Clarke subdifferentials on Hadamard manifolds have not been investigated before.<\/jats:p>","DOI":"10.1051\/ro\/2024096","type":"journal-article","created":{"date-parts":[[2024,4,29]],"date-time":"2024-04-29T18:59:45Z","timestamp":1714417185000},"page":"2817-2844","source":"Crossref","is-referenced-by-count":3,"title":["Characterizations of the solution set of nonsmooth semi-infinite programming problems on Hadamard manifolds"],"prefix":"10.1051","volume":"58","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7115-693X","authenticated-orcid":false,"given":"Balendu Bhooshan","family":"Upadhyay","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shivani","family":"Sain","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"250","published-online":{"date-parts":[[2024,7,15]]},"reference":[{"key":"R1","doi-asserted-by":"crossref","unstructured":"Absil P.A., Mahony R. and Sepulchre R., Optimization Algorithms on Matrix Manifolds. 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