Summary
The singular integral operatorA defined by the formula is investigated. In particular it is shown that, if and only ifa(x)=1−x 2)1/2[1+α/(1−x)+β/(1+x)], the eigenfunctions ofA are polynomials (of degreen=0, 1, 2, 3 ...) and the corresponding eigenvalues are just the nonnegative integersn. Some other related results are also reported, including certain neat integral relationships satisfied by the Tchebichef polynomials of the second kind.
Riassunto
Si studiano alcune proprietà dell'operatore integrale singolareA definito dalla formula. In particolare si dimostra che, se e solo sea(x)=(1−x 2)1/2[1+α/(1−x)+β/(1+x)], le autofunzioni diA sono polinomi (di gradon=0, 1, 2, 3, ...) ed i corrispondenti autovalori sono proprio i numeri (interi non negativi)n. Si riporta anche qualche altro risultato connesso a questi, comprese alcune semplici relazioni integrali soddisfatte dai polinomi di Tchebichef del secondo tipo.
Резюме
Исследуется сингулярный интегральный операторA, определенный выражениемA В частности, показывается, что если то собственные функцииA являютося полиномами (степениn,n=0, 1, 2, ...); и соответствующие собственные значения неотрицательные целые числаn. Приводятся другие результаты, включающие (новое) интегральное соотношение, которому удовлетворяют полиномы Чебышева второго рода.
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References
F. Calogero andA. M. Perelomov:Lett. Nuovo Cimento,23, 650 (1978).
N. I. Muskhelishvili:Singular Integral Equations (Groningen, 1953) (translated from the Russian).
S. G. Mikhlin:Multidimensional Singular Integrals and Integral Equations (London, 1965) (translated from the Russian).
N. P. Vekua:Systems of Singular Integral Equations (Groningen, 1967) (translated from the Russian).
V. Smirnov:Cours de mathématiques supérieures, Vol.4, sect. I-57 (Moscow, 1975) (translated from the Russian).
A. D. Myškis:Advanced Mathematics for Engineers, chapter VII, sect.5 (Moscow, 1975) (translated from the Russian).
A. Erdélyi, Editor:Higher Transcendental Functions, Vol.2 (New York, N. Y., 1953).
A. Erdélyi, Editor:Tables of Integral Transforms, Vol.2 (New York, N. Y., 1954).
M. Abramowitz andI. A. Stegun, Editors:Handbook of Mathematical Functions (New York, N. Y., 1955).
I. S. Gradshteyn andI. M. Ryzhik:Tables of Integrals, Series and Products (New York, N. Y., 1965) (translation from the Russian edited byA. Jeffrey).
A. M. Perelomov:Ann. Inst. Henri Poincaré,28, 407 (1978);M. Bruschi:Lett. Nuovo Cimento,24, 509 (1978).
Some progress in this direction has already been made;F. Calogero:Integral representation and generating function for the polynomials U (α,β)(x)n submitted toLett. Nuovo Cimento.
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The research reported in this paper has been supported in part by the CNR grant No. 78.00919.02.
Перевебено ребакцией.
An erratum to this article is available at http://dx.doi.org/10.1007/BF02739910.
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Calogero, F. Singular integral operators with integral eigenvalues and polynomial eigenfunctions. Nuov Cim B 51, 1–14 (1979). https://doi.org/10.1007/BF02743692
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DOI: https://doi.org/10.1007/BF02743692