Electron. J. Differential Equations, Vol. 2016 (2016), No. 246, pp. 1-11.

Systems-disconjugacy of a fourth-order differential equation with a middle term

Jamel Ben Amara

This article was published in two journals: the EJDE and Communications in Applied Analysis.
Jamel Ben Amara; Systems-disconjugacy of a fourth-order differential equation with a middle term, Communications in Applied Analysis, vol. 20 (2016), 25-36.
This is unacceptable in the mathematical community; so the article has been retracted.

Submitted July 28, 2016. Published September 12, 2016. Retracted August 2, 2917.
Math Subject Classifications: 47E05, 34B05, 34C10.
Key Words: Fourth-order boundary value problems; system-conjugate points; subwronskians; comparison theorems.

This article is not availabe any more.

Jamel Ben Amara
University of Tunis El Manar
Faculty of Sciences of Tunis, Tunisia
email: jamel_benamara@yahoo.fr

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