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Sobre Polinômios Ortogonais Excepcionais / On Exceptional Orthogonal PolynomialsFukushima, Paula Akari 23 May 2018 (has links)
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Previous issue date: 2018-05-23 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Nesta dissertação estudamos sequências de polinômios ortogonais que surgem como auto-funções polinomiais do problema de Sturm-Liouville, sob a condição de que, nem todos os graus das auto-funções polinomiais estejam presentes na sequência de graus dos polinômios que formam o conjunto ortogonal completo. Estas sequências são chamadas de sequências de polinômios ortogonais excepcionais. Emparticular,realizamosumestudodospolinômiosortogonaisexcepcionais X1-Jacobi e X1-Laguerre. / In this dissertation we study sequences of orthogonal polynomials that arise as polynomial eigenfunctions of the Sturm-Liouville problem, with the condition that not all degrees of polynomial eigenfunctions are present in the sequence of degrees of the polynomials that form a complete orthogonal set. These sequences are called exceptional orthogonal polynomial sequences. In particular, we study the exceptional orthogonal polynomials X1-Jacobi and X1-Laguerre.
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Spectral properties of integrable Schrodinger operators with singular potentialsHaese-Hill, William January 2015 (has links)
The integrable Schrödinger operators often have a singularity on the real line, which creates problems for their spectral analysis. In several particular cases we show that all closed gaps lie on the infinite spectral arc. In the second part we develop a theory of complex exceptional orthogonal polynomials corresponding to integrable rational and trigonometric Schrödinger operators, which may have a singularity on the real line. In particular, we study the properties of the corresponding complex exceptional Hermite polynomials related to Darboux transformations of the harmonic oscillator, and exceptional Laurent orthogonal polynomials related to trigonometric monodromy-free operators.
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Studies on generalizations of the classical orthogonal polynomials where gaps are allowed in their degree sequences / 次数列に欠落が存在するような古典直交多項式の一般化に関する研究Luo, Yu 23 March 2020 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(情報学) / 甲第22583号 / 情博第720号 / 新制||情||123(附属図書館) / 京都大学大学院情報学研究科数理工学専攻 / (主査)教授 中村 佳正, 教授 矢ヶ崎 一幸, 准教授 辻本 諭 / 学位規則第4条第1項該当 / Doctor of Informatics / Kyoto University / DFAM
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