A factorization method for an inverse Neumann problem for harmonic vector fields.
Kress, R. (2003)
Georgian Mathematical Journal
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Kress, R. (2003)
Georgian Mathematical Journal
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Chkadua, O. (1995)
Georgian Mathematical Journal
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Chudinovich, Igor, Constanda, Christian (2003)
Georgian Mathematical Journal
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Gachechiladze, A., Natroshvili, D. (2001)
Georgian Mathematical Journal
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B. Kapitonov (1992)
Banach Center Publications
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Mao, Jinxiu, Zhao, Zengqin, Xu, Naiwei (2011)
Bulletin of the Malaysian Mathematical Sciences Society. Second Series
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Brykalov, S.A. (1994)
Georgian Mathematical Journal
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Burchuladze, T., Burchuladze, D. (1998)
Georgian Mathematical Journal
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Khomasuridze, N. (2003)
Georgian Mathematical Journal
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Duduchava, R., Natroshvili, D., Shargorodsky, E. (1995)
Georgian Mathematical Journal
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Mesloub, S., Bouziani, A., Kechkar, N. (2002)
Georgian Mathematical Journal
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Mukhigulashvili, S. (2003)
Georgian Mathematical Journal
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Wenjie Gao, Junyu Wang (1995)
Annales Polonici Mathematici
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The periodic boundary value problem u''(t) = f(t,u(t),u'(t)) with u(0) = u(2π) and u'(0) = u'(2π) is studied using the generalized method of upper and lower solutions, where f is a Carathéodory function satisfying a Nagumo condition. The existence of solutions is obtained under suitable conditions on f. The results improve and generalize the work of M.-X. Wang et al. [5].