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28 March 2024
 
  » arxiv » 1412.5237

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Liouville transformation, analytic approximation of transmutation operators and solution of spectral problems
Vladislav V. Kravchenko ; Samy Morelos ; Sergii M. Torba ;
Date 17 Dec 2014
AbstractA method for solving spectral problems for the Sturm-Liouville equation $(pv^{prime})^{prime}-qv+lambda rv=0$ based on the approximation of the Delsarte transmutation operators combined with the Liouville transformation is presented. The problem of numerical approximation of solutions and of eigendata is reduced to approximation of a pair of functions depending on the coefficients $p$, $q$ and $r$ by a finite linear combination of certain specially constructed functions related to generalized wave polynomials introduced in arXiv:1208.5984, arXiv:1208.6166. The method allows one to compute both lower and higher eigendata with an extreme accuracy. Several necessary results concerning the action of the Liouville transformation on formal powers arising in the method of spectral parameter power series are obtained as well as the transmutation operator for the Sturm-Liouville operator $frac{1}{r}left(frac{d}{dx}pfrac{d}{dx}-q ight)$.
Source arXiv, 1412.5237
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