Geodesic
On a Remarkable Sequence of Bessel Matrices
Matematičeskie zametki, Tome 98 (2015) no. 5, pp. 651-663

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A sequence of matrices whose elements are modified Bessel functions of the first kind is considered. Such a sequence arises when studying certain ordinary linear homogeneous second-order differential equations belonging to the family of double confluent Heun equations. The conjecture that these matrices are nonsingular is discussed together with its application to the problem of the existence of solutions analytic at the singular point of the equation referred to above.
Keywords: modified Bessel function of the first kind, Josephson junction
Mots-clés : double confluent Heun equation, Bessel matrix, Laurent series, Hessenberg matrix. 
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     author = {V. M. Buchstaber and S. I. Tertychnyi},
     title = {On a {Remarkable} {Sequence} of {Bessel} {Matrices}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {651--663},
     publisher = {mathdoc},
     volume = {98},
     number = {5},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2015_98_5_a1/}
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V. M. Buchstaber; S. I. Tertychnyi. On a Remarkable Sequence of Bessel Matrices. Matematičeskie zametki, Tome 98 (2015) no. 5, pp. 651-663. http://geodesic.mathdoc.fr/item/MZM_2015_98_5_a1/