The solution of the two-point boundary value problem for a nonlinear differential equation of the third order
Ľudmila Zajacová (1986)
Mathematica Slovaca
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Ľudmila Zajacová (1986)
Mathematica Slovaca
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Ján Andres, Vladimír Vlček (1992)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
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Ján Andres, Vladimír Vlček (1993)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
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Shibata, Tetsutaro (2009)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Michal Fečkan (2005)
Mathematica Slovaca
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Ryszard Szwarc (1998)
Colloquium Mathematicae
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Harper’s operator is defined on by where . We show that the norm of is less than or equal to for . This solves a conjecture stated in [1]. A general formula for estimating the norm of self-adjoint tridiagonal infinite matrices is also derived.