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To create a more efficient tool in uncertain conditions, this paper introduces and investigates the concept of a complex Pythagorean Dombi fuzzy graph (CPNDFG) in comparison to a more generalized Pythagorean neutrosophic Dombi fuzzy graph (PNDFG). Dombi operators (D-Operators) play an important role in converting data into a single value for effective decision-making. To investigate further relationships among CPNDFGs, the concepts of complement, self-complement, isomorphism, weak isomorphism (W-isomorphism), and co-weak isomorphism (CoW-isomorphism) are introduced and investigated. Furthermore, the concepts of regular CPNDFG, edge regular CPNDFG, and totally edge regular CPNDFG, as well as their applications in decision-making problems, are explored.<\/jats:p>","DOI":"10.1177\/18758967251383574","type":"journal-article","created":{"date-parts":[[2025,10,7]],"date-time":"2025-10-07T15:51:38Z","timestamp":1759852298000},"page":"1585-1613","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Complex Pythagorean Neutrosophic Dombi Fuzzy Graph: Novel Investigations and Applications"],"prefix":"10.1177","volume":"50","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-1509-2538","authenticated-orcid":false,"given":"Abrar","family":"Ahmad","sequence":"first","affiliation":[{"name":"Department of Mathematics, University of the Punjab, New Campus, Lahore, Pakistan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1071-2808","authenticated-orcid":false,"given":"M","family":"Khalid Mahmood","sequence":"additional","affiliation":[{"name":"Department of Mathematics, University of the Punjab, New Campus, Lahore, Pakistan"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0966-8237","authenticated-orcid":false,"given":"Daud","family":"Ahmad","sequence":"additional","affiliation":[{"name":"Department of Mathematics, University of the Punjab, New Campus, Lahore, Pakistan"}]}],"member":"179","published-online":{"date-parts":[[2025,10,7]]},"reference":[{"issue":"2","key":"e_1_3_3_2_1","first-page":"108","article-title":"Pythagorean neutrosophic fuzzy graphs","volume":"11","author":"Ajay D.","year":"2020","unstructured":"Ajay D., Chellamani P. 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