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so the article has been retracted.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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