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  1. In this paper, we introduce and study a tripled system of three associated fractional differential equations. Prior to proceeding to the main results, the proposed system is converted into an equivalent integr...

    Authors: Mohammed M. Matar, Iman Abo Amra and Jehad Alzabut

    Citation: Boundary Value Problems 2020 2020:140

    Content type: Research

    Published on:

  2. In this research article, we develop a qualitative analysis to a class of nonlinear coupled system of fractional delay differential equations (FDDEs). Under the integral boundary conditions, existence and uniq...

    Authors: Hussam Alrabaiah, Israr Ahmad, Kamal Shah and Ghaus Ur Rahman

    Citation: Boundary Value Problems 2020 2020:138

    Content type: Research

    Published on:

  3. The paper deals with the study of the existence result for a Kirchhoff elliptic system with additive right-hand side and variable parameters by using the sub-/supersolution method. Our study is a natural exten...

    Authors: Mohamed Haiour, Salah Boulaaras, Youcef Bouizem and Rafik Guefaifia

    Citation: Boundary Value Problems 2020 2020:134

    Content type: Research

    Published on:

  4. In this paper, we consider the existence of a least energy nodal solution and a ground state solution, energy doubling property and asymptotic behavior of solutions of the following critical problem:

    Authors: Chungen Liu and Hua-Bo Zhang

    Citation: Boundary Value Problems 2020 2020:133

    Content type: Research

    Published on:

  5. A mathematical model of HIV infection with the combination of drug therapy including cytotoxic T-lymphocyte (CTL) and the antibody immune response is examined. The threshold value represented as the basic repr...

    Authors: V. Geetha and S. Balamuralitharan

    Citation: Boundary Value Problems 2020 2020:132

    Content type: Research

    Published on:

  6. The Editor-in-Chief has retracted this article [1] because the results are invalid. The article also shows evidence of authorship manipulation. Additionally, Universidad de Talca have confirmed that Ben Rodrig...

    Authors: Gaiping He, Lihong Wang and Ben Rodrigo

    Citation: Boundary Value Problems 2020 2020:127

    Content type: Retraction Note

    Published on:

    The original article was published in Boundary Value Problems 2018 2018:57

  7. The Editors-in-Chief have retracted this article [1] because its results are invalid. It also shows considerable overlap with an article by Lu and Sun [2] that was simultaneously under consideration. Additiona...

    Authors: Yili Tan, Weiyong Ding, Yourong Wang and Zongjing Jiang

    Citation: Boundary Value Problems 2020 2020:126

    Content type: Retraction Note

    Published on:

    The original article was published in Boundary Value Problems 2017 2017:176

  8. We introduce the investigation of approximate controllability for a new class of nonlocal and noninstantaneous impulsive Hilfer fractional neutral stochastic integrodifferential equations with fractional Brown...

    Authors: Hamdy M. Ahmed, Mahmoud M. El-Borai, A. S. Okb El Bab and M. Elsaid Ramadan

    Citation: Boundary Value Problems 2020 2020:120

    Content type: Research

    Published on:

  9. The existence of a solution for a second-order p-Laplacian boundary value problem at resonance with two dimensional kernel will be considered in this paper. A semi-projector, the Ge and Ren extension of Mawhin...

    Authors: O. F. Imaga and S. A. Iyase

    Citation: Boundary Value Problems 2020 2020:114

    Content type: Research

    Published on:

  10. For the nonlinear predator–prey system (PPS), although a variety of numerical methods have been proposed, such as the difference method, the finite element method, and so on, but the efficient numerical method...

    Authors: Dandan Dai, Ximing Lv and Yulan Wang

    Citation: Boundary Value Problems 2020 2020:105

    Content type: Research

    Published on:

  11. This paper is concerned with the inverse scattering of time-harmonic acoustic plane waves by a multi-layered fluid–solid medium in the three dimensional space. We establish the global uniqueness in identifying...

    Authors: Yanli Cui, Xiliang Li and Fenglong Qu

    Citation: Boundary Value Problems 2020 2020:101

    Content type: Research

    Published on:

  12. The Editors-in-Chief have retracted this article [1] because it significantly overlaps with a number of previously published articles from different authors [2–4]. The author has not responded to any correspon...

    Authors: Zhiqiang Li

    Citation: Boundary Value Problems 2020 2020:100

    Content type: Retraction Note

    Published on:

    The original article was published in Boundary Value Problems 2015 2015:242

  13. This research work is dedicated to investigating a class of impulsive fractional order differential equations under the Robin boundary conditions via the application of topological degree theory (TDT). We esta...

    Authors: Atta Ullah, Kamal Shah, Thabet Abdeljawad, Rahmat Ali Khan and Ibrahim Mahariq

    Citation: Boundary Value Problems 2020 2020:98

    Content type: Research

    Published on:

  14. In this paper, we study a nonlinear fractional differential equation involving two mixed fractional orders with nonlocal boundary conditions. By using some new techniques, we introduce a formula of solutions f...

    Authors: Fang Li, Wenjing Yang and Huiwen Wang

    Citation: Boundary Value Problems 2020 2020:97

    Content type: Research

    Published on:

  15. This paper deals with the implementation of the spectral discretization of the vorticity–velocity–pressure formulation of the nonstationary Stokes problem. We use the implicit Euler scheme for the discretizati...

    Authors: Mohamed Abdelwahed, Nejmeddine Chorfi and Henda Ouertani

    Citation: Boundary Value Problems 2020 2020:94

    Content type: Research

    Published on:

  16. In this paper, we develop optimal Phragmén–Lindelöf methods, based on the use of maximum modulus of optimal value of a parameter in a Schrödinger functional, by applying the Phragmén–Lindelöf theorem for a sec...

    Authors: Chaofeng Zhang and Rong Hu

    Citation: Boundary Value Problems 2020 2020:93

    Content type: Research

    Published on:

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