tailieunhanh - Báo cáo hóa học: " On existence and uniqueness of positive solutions to a class of fractional boundary value problems"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : On existence and uniqueness of positive solutions to a class of fractional boundary value problems | Caballero et al. Boundary Value Problems 2011 2011 25 http content 2011 1 25 0 Boundary Value Problems a SpringerOpen Journal RESEARCH Open Access On existence and uniqueness of positive solutions to a class of fractional boundary value problems J Caballero J Harjani and K Sadarangani Correspondence fefi@. es Departamento de Matemáticas Universidad de Las Palmas de Gran Canaria Campus de Tafira Baja 35017 Las Palmas de Gran Canaria Spain Springer Abstract The purpose of this paper is to investigate the existence and uniqueness of positive solutions for the following fractional boundary value problem D0 u t f t u t 0 0 t 1 u 0 u 1 u 0 0 where 2 a 3 and D0 is the Riemann-Liouville fractional derivative. Our analysis relies on a fixed-point theorem in partially ordered metric spaces. The autonomous case of this problem was studied in the paper Zhao et al. Abs. Appl. Anal. to appear but in Zhao et al. to appear the question of uniqueness of the solution is not treated. We also present some examples where we compare our results with the ones obtained in Zhao et al. to appear . 2010 Mathematics Subject Classification 34B15 Keywords fractional boundary value problem fixed-point theorem positive solution 1 Introduction Differential equations of fractional order occur more frequently on different research areas and engineering such as physics chemistry economics etc. Indeed we can find numerous applications in viscoelasticity electrochemistry control porous media electromagnetic etc. 1-6 . For an extensive collection of results about this type of equations we refer the reader to the monograph by Kilbas and Trujillo 7 Samko Kilbas and Marichev 8 Miller and Ross 9 and Podlubny 10 . On the other hand some basic theory for the initial value problems of fractional differential equations involving the Riemann-Lioville differential operator has been discussed by Lakshmikantham et al. 11 12 Bai et al. 13-16 Zhang 17 etc. In 15 the authors .

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