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  1. 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:

  2. 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:

  3. 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:

  4. 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:

  5. 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

  6. 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:

  7. 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:

  8. 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:

  9. 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:

  10. The paper studies a system of nonlinear viscoelastic Kirchhoff system with a time varying delay and general coupling terms. We prove the global existence of solutions in a bounded domain using the energy and F...

    Authors: Nadia Mezouar and Salah Boulaaras

    Citation: Boundary Value Problems 2020 2020:90

    Content type: Research

    Published on:

  11. The Editors-in-Chief have retracted this article [1] because it significantly overlaps with an article from other authors that was simultaneously under consideration at another journal [2]. Additionally, the a...

    Authors: Jiaofeng Wang, Jun Pu, Bin Huang and Guojian Shi

    Citation: Boundary Value Problems 2020 2020:86

    Content type: Retraction Note

    Published on:

    The original article was published in Boundary Value Problems 2015 2015:230

  12. The Editors-in-Chief have retracted this article [1] because it significantly overlaps with a previously published article by Pang et al. [2]. The article also shows evidence of authorship manipulation. The id...

    Authors: Zhiqiang Li and Mohamed Vetro

    Citation: Boundary Value Problems 2020 2020:78

    Content type: Retraction Note

    Published on:

    The original article was published in Boundary Value Problems 2015 2015:159

  13. In this article, we study a modified maximum principle approach under condition on the weight of the delay term in the feedback and the weight of the term without delay. On that basis, we prove the existence o...

    Authors: Yisheng Hu, Songhai Qin, Zhibin Liu and Yi Wang

    Citation: Boundary Value Problems 2020 2020:75

    Content type: Research

    Published on:

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