{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:20:17Z","timestamp":1760149217410,"version":"build-2065373602"},"reference-count":40,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2023,7,13]],"date-time":"2023-07-13T00:00:00Z","timestamp":1689206400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Mohamed E. Nasr","award":["Mohamed E. Nasr"],"award-info":[{"award-number":["Mohamed E. Nasr"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The second kind of two-dimensional nonlinear integral equation (NIE) with symmetric and nonsymmetrical kernel is solved in the Banach space L2[0,1]\u00d7L2[0,1]. Here, the NIE\u2019s existence and singular solution are described in this passage. Additionally, we use a numerical strategy that uses hybrid and block-pulse functions to obtain the approximate solution of the NIE in a two-dimensional problem. For this aim, the two-dimensional NIE will be reduced to a system of nonlinear algebraic equations (SNAEs). Then, the SNAEs can be solved numerically. This study focuses on showing the convergence analysis for the numerical approach and generating an estimate of the error. Examples are presented to prove the efficiency of the approach.<\/jats:p>","DOI":"10.3390\/sym15071408","type":"journal-article","created":{"date-parts":[[2023,7,14]],"date-time":"2023-07-14T00:28:06Z","timestamp":1689294486000},"page":"1408","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Hybrid Functions Approach via Nonlinear Integral Equations with Symmetric and Nonsymmetrical Kernel in Two Dimensions"],"prefix":"10.3390","volume":"15","author":[{"given":"Sahar M.","family":"Abusalim","sequence":"first","affiliation":[{"name":"Department of Mathematics, College of Science and Arts\u2014Gurayat, Jouf University, Sakakah 77454, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohamed A.","family":"Abdou","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Faculty of Education, Alexandria University, Alexandria 21511, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5865-278X","authenticated-orcid":false,"given":"Mohamed A.","family":"Abdel-Aty","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Faculty of Science, Benha University, Benha 13518, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohamed E.","family":"Nasr","sequence":"additional","affiliation":[{"name":"Department of Mathematics, College of Science and Arts\u2014Gurayat, Jouf University, Sakakah 77454, Saudi Arabia"},{"name":"Department of Mathematics, Faculty of Science, Benha University, Benha 13518, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1186\/s42787-020-00074-8","article-title":"On a discussion of Volterra\u2014Fredholm integral equation with discontinuous kernel","volume":"28","author":"Abdou","year":"2020","journal-title":"J. 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