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Closed-Form Solutions of the Thomas-Fermi in Heavy Atoms and the Langmuir-Blodgett in Current Flow ODEs in Mathematical Physics

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  • Efstathios E. Theotokoglou
  • Theodoros I. Zarmpoutis
  • Ioannis H. Stampouloglou

Abstract

Two kinds of second-order nonlinear, ordinary differential equations (ODEs) appearing in mathematical physics are analyzed in this paper. The first one concerns the Thomas-Fermi (TF) equation, while the second concerns the Langmuir-Blodgett (LB) equation in current flow. According to a mathematical methodology recently developed, the exact analytic solutions of both TF and LB ODEs are proposed. Both of these are nonlinear of the second order and by a series of admissible functional transformations are reduced to Abel’s equations of the second kind of the normal form. The closed form solutions of the TF and LB equations in the phase and physical plane are given. Finally a new interesting result has been obtained related to the derivative of the TF function at the limit.

Suggested Citation

  • Efstathios E. Theotokoglou & Theodoros I. Zarmpoutis & Ioannis H. Stampouloglou, 2015. "Closed-Form Solutions of the Thomas-Fermi in Heavy Atoms and the Langmuir-Blodgett in Current Flow ODEs in Mathematical Physics," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-8, August.
    • Handle: RePEc:hin:jnlmpe:721637
    DOI: 10.1155/2015/721637
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