{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T16:16:19Z","timestamp":1772295379504,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2021,1,8]],"date-time":"2021-01-08T00:00:00Z","timestamp":1610064000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the project of Shandong Province Higher Educational Science and Technology Program of China","award":["J18KA233"],"award-info":[{"award-number":["J18KA233"]}]},{"name":"the Natural Science Fund for Distinguished Young Scholars of Shandong Province","award":["JQ201613"],"award-info":[{"award-number":["JQ201613"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>In this paper, sufficient conditions ensuring existence and multiplicity of positive solutions for a class of nonlinear singular fractional differential systems are derived with Riemann\u2013Stieltjes coupled integral boundary value conditions in Banach Spaces. Nonlinear functions f(t,u,v) and g(t,u,v) in the considered systems are allowed to be singular at every variable. The boundary conditions here are coupled forms with Riemann\u2013Stieltjes integrals. In order to overcome the difficulties arising from the singularity, a suitable cone is constructed through the properties of Green\u2019s functions associated with the systems. The main tool used in the present paper is the fixed point theorem on cone. Lastly, an example is offered to show the effectiveness of our obtained new results.<\/jats:p>","DOI":"10.3390\/sym13010107","type":"journal-article","created":{"date-parts":[[2021,1,10]],"date-time":"2021-01-10T23:03:42Z","timestamp":1610319822000},"page":"107","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Positive Solutions for a Class of Nonlinear Singular Fractional Differential Systems with Riemann\u2013Stieltjes Coupled Integral Boundary Value Conditions"],"prefix":"10.3390","volume":"13","author":[{"given":"Daliang","family":"Zhao","sequence":"first","affiliation":[{"name":"School of Mathematics and Statistics, Shandong Normal University, Jinan 250014, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juan","family":"Mao","sequence":"additional","affiliation":[{"name":"Department of Basic Courses, Shandong Polytechnic, Jinan 250104, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"600","DOI":"10.1080\/00036811.2017.1399360","article-title":"The stability of the equilibria of the Allen-Cahn equation with fractional diffusion","volume":"98","author":"Cheng","year":"2019","journal-title":"Appl. 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