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International Journal of Mathematics and Mathematical Sciences
Volume 15, Issue 1, Pages 119-128

On the oscillatory properties of the solutions of a class of integro-differential equations of neutral type

1P.O. Box 45, Sofia 1504, Bulgaria
2Plovdiv University “Paissii Hilendarski”, Bulgaria
3Moscow Institute of Railway Transport Engineering, Russia

Received 17 January 1990; Revised 6 September 1990

Copyright © 1992 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In the present paper the oscillatory properties of the solutions of the equation[(Lx)(t)](n)+ItK(t,s,x(s))ds=0are investigated where n1, L is an operator of the difference type, It, K:DK, DK3, x:[αx,]. Under natural conditions imposed on L, It and K it is proved that for n even all ultimately nonzero solutions oscillate and for n odd they either oscillate or tend to zero as t.