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A novel approach to construct the adjoint problem for a first-order functional integro-differential equation with general nonlocal condition

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Abstract

In this work, with the aim of determining Green’s solution or generalized Green’s solution, we propose a novel constructive approach by which a linear or specific nonlinear problem involving general linear nonlocal condition for a first-order functional ordinary integro-differential equation with general nonsmooth coefficients satisfying some general properties such as p-integrability and boundedness is reduced to an integral equation. A system of two integro-algebraic equations, called “the adjoint system,” is constructed for this problem. Green’s functional for the problem with trivial kernel and generalized Green’s functional for the problem with nontrivial kernel are the unique solutions to the specific cases of this adjoint system. Green’s functional and generalized Green’s functional have two components. Their first components correspond to Green’s function and generalized Green’s function for the problem, respectively. Some illustrative applications are provided with known and unknown results.

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Authors and Affiliations

  1. Department of Mathematics, İstanbul Technical University, Maslak, 34469, İstanbul, Turkey

    Kemal Özen & Kamil Oruçoğlu

  2. Department of Mathematics, Namık Kemal University, Değirmenaltı, 59030, Tekirdağ, Turkey

    Kemal Özen

Authors
  1. Kemal Özen
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  2. Kamil Oruçoğlu
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Correspondence to Kemal Özen.

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Özen, K., Oruçoğlu, K. A novel approach to construct the adjoint problem for a first-order functional integro-differential equation with general nonlocal condition. Lith Math J 54, 482–502 (2014). https://doi.org/10.1007/s10986-014-9259-3

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  • DOI: https://doi.org/10.1007/s10986-014-9259-3

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