{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:41:06Z","timestamp":1760233266369,"version":"build-2065373602"},"reference-count":46,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,12,27]],"date-time":"2022-12-27T00:00:00Z","timestamp":1672099200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"The Scientific and Technological Research Council of Turkey (T\u00dcB\u0130TAK)","award":["122F326"],"award-info":[{"award-number":["122F326"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The main purpose of this paper is to investigate lightlike hypersurfaces of almost productlike semi-Riemannian manifolds. For this purpose, screen-semi-invariant, screen-invariant, radical-anti-invariant, and radical-invariant lightlike hypersurfaces of almost productlike semi-Riemannian manifolds are introduced and some examples of these classifications are presented. Furthermore, various characterizations dealing screen semi-invariant lightlike hypersurfaces are obtained.<\/jats:p>","DOI":"10.3390\/sym15010077","type":"journal-article","created":{"date-parts":[[2022,12,28]],"date-time":"2022-12-28T08:42:22Z","timestamp":1672216942000},"page":"77","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Lightlike Hypersurfaces of Almost Productlike Semi-Riemannian Manifolds"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7228-8240","authenticated-orcid":false,"given":"\u00d6mer","family":"Aksu","sequence":"first","affiliation":[{"name":"Department of Mathematics, Faculty of Arts and Sciences, Harran University, \u015eanl\u0131urfa 63300, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6950-7633","authenticated-orcid":false,"given":"Mehmet","family":"G\u00fclbahar","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Faculty of Arts and Sciences, Harran University, \u015eanl\u0131urfa 63300, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0456-6418","authenticated-orcid":false,"given":"Esra","family":"Erkan","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Faculty of Arts and Sciences, Harran University, \u015eanl\u0131urfa 63300, Turkey"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,27]]},"reference":[{"key":"ref_1","first-page":"225","article-title":"Statistical manifolds with almost complex structures","volume":"72","author":"Takano","year":"2010","journal-title":"Tensor New Ser."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1950129","DOI":"10.1142\/S0219887819501299","article-title":"Some inequalities for statistical submanifolds of quaternion Kaehler-like statistical space forms","volume":"16","author":"Aquib","year":"2019","journal-title":"Int. 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