Regularity Results for Hybrid Proportional Operators on Hölder Spaces
Recently, a new type of derivative has been introduced, known as Caputo proportional derivatives. These are motivated by the applications of such derivatives (which are a generalization of Caputo’s standard fractional derivative) and the need to incorporate such calculus into the research on operato...
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MDPI AG
2025-01-01
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| Series: | Fractal and Fractional |
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| author | Mieczysław Cichoń Hussein A. H. Salem Wafa Shammakh |
| author_facet | Mieczysław Cichoń Hussein A. H. Salem Wafa Shammakh |
| author_sort | Mieczysław Cichoń |
| collection | DOAJ |
| description | Recently, a new type of derivative has been introduced, known as Caputo proportional derivatives. These are motivated by the applications of such derivatives (which are a generalization of Caputo’s standard fractional derivative) and the need to incorporate such calculus into the research on operators. The investigation therefore focuses on the equivalence of differential and integral problems for proportional calculus problems. The operators are always studied in the appropriate function spaces. Furthermore, the investigation extends these results to encompass the more general notion of Hilfer hybrid derivatives. The primary aim of this study is to preserve the maximal regularity of solutions for this class of problems. To this end, we consider such operators not only in spaces of absolutely continuous functions, but also in particular in little Hölder spaces. It is widely acknowledged that these spaces offer a natural framework for the study of classical Riemann–Liouville integral operators as inverse operators with derivatives of fractional order. This paper presents a comprehensive study of this problem for proportional derivatives and demonstrates the application of the obtained results to Langevin-type boundary problems. |
| format | Article |
| id | doaj-art-681e67fe03c042cfacc6a9fa79b7ad3b |
| institution | DOAJ |
| issn | 2504-3110 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fractal and Fractional |
| spelling | doaj-art-681e67fe03c042cfacc6a9fa79b7ad3b2025-08-20T02:44:56ZengMDPI AGFractal and Fractional2504-31102025-01-01925810.3390/fractalfract9020058Regularity Results for Hybrid Proportional Operators on Hölder SpacesMieczysław Cichoń0Hussein A. H. Salem1Wafa Shammakh2Faculty of Mathematics and Computer Science, Adam Mickiewicz University, Uniwersytetu Poznańskiego 4, 61-614 Poznań, PolandDepartment of Mathematics and Computer Science, Faculty of Sciences, Alexandria University, Alexandria 5424041, EgyptDepartment of Mathematics and Statistics, College of Science, University of Jeddah, Jeddah 21493, Saudi ArabiaRecently, a new type of derivative has been introduced, known as Caputo proportional derivatives. These are motivated by the applications of such derivatives (which are a generalization of Caputo’s standard fractional derivative) and the need to incorporate such calculus into the research on operators. The investigation therefore focuses on the equivalence of differential and integral problems for proportional calculus problems. The operators are always studied in the appropriate function spaces. Furthermore, the investigation extends these results to encompass the more general notion of Hilfer hybrid derivatives. The primary aim of this study is to preserve the maximal regularity of solutions for this class of problems. To this end, we consider such operators not only in spaces of absolutely continuous functions, but also in particular in little Hölder spaces. It is widely acknowledged that these spaces offer a natural framework for the study of classical Riemann–Liouville integral operators as inverse operators with derivatives of fractional order. This paper presents a comprehensive study of this problem for proportional derivatives and demonstrates the application of the obtained results to Langevin-type boundary problems.https://www.mdpi.com/2504-3110/9/2/58proportional calculusintegral operatorsHölder spaceshybrid proportional derivatives |
| spellingShingle | Mieczysław Cichoń Hussein A. H. Salem Wafa Shammakh Regularity Results for Hybrid Proportional Operators on Hölder Spaces Fractal and Fractional proportional calculus integral operators Hölder spaces hybrid proportional derivatives |
| title | Regularity Results for Hybrid Proportional Operators on Hölder Spaces |
| title_full | Regularity Results for Hybrid Proportional Operators on Hölder Spaces |
| title_fullStr | Regularity Results for Hybrid Proportional Operators on Hölder Spaces |
| title_full_unstemmed | Regularity Results for Hybrid Proportional Operators on Hölder Spaces |
| title_short | Regularity Results for Hybrid Proportional Operators on Hölder Spaces |
| title_sort | regularity results for hybrid proportional operators on holder spaces |
| topic | proportional calculus integral operators Hölder spaces hybrid proportional derivatives |
| url | https://www.mdpi.com/2504-3110/9/2/58 |
| work_keys_str_mv | AT mieczysławcichon regularityresultsforhybridproportionaloperatorsonholderspaces AT husseinahsalem regularityresultsforhybridproportionaloperatorsonholderspaces AT wafashammakh regularityresultsforhybridproportionaloperatorsonholderspaces |