• Journal of the Korean Mathematical Society
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• v.33 no.4
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• pp.857-863
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• 1996

In 1954 M. H. Protter [1] formulated the following boundary value problem as an analogue of the plane Darboux problem.

• Journal of the Korean Mathematical Society
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• v.39 no.5
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• pp.681-692
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• 2002

In the article [2], the conjugate Darboux-Protter problem Dn is formulated for the two dimensional wave equation in the class of unbounded functions and the uniqueness of solutions has been established. In this paper, we shall show the existence of solutions for the hyperbolic equations with Bessel operators in another special case.