The asymptotic expansion valid outside any angle , 0$ SRC=http://ej.iop.org/images/0025-5726/36/3/A02/tex_im_2031_img4.gif/>, is obtained for the Weyl-Titchmarsh function of the Sturm-Liouville problem on the half-axis with potential . Bibliography: 8 titles.
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Danielyan et al. (1991) studied this question.
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