This paper considers the oscillation problem for forced nonlinear difference equations of the form 0096-3 doi:10 * Co E-m Dxn þ qnf ðxn sÞ 1⁄4 en: We study three cases: qn P 0, qn < 0 and qn is oscillatory. No restriction assumed in known literatures is imposed on the forcing term en. 2006 Elsevier Inc. All rights reserved.

By employing the generalized Riccati transformation technique, we will establish some new oscillation criteria for a certain class of third order nonlinear delay difference equations. Our results extend and improve some previously obtained ones. An example is worked out to demonstrate the validity of the proposed results.

Sufficient conditions for the oscillation of solutions of the nonlinear second-order difference equation of the form [p(k)ψ(y(k)) y(k)] + q(k)h(y(k))g( y(k − r(k))) y(k) + f (k, y(k), y(k − s1(k)), y(k − s2(k)), . . . , y(k − sn(k))) = 0 are established. We obtain a series of results for oscillatory behaviour. © 2004 Elsevier Ltd. All rights reserved. MSC: 39A10

Various new criteria for the oscillation of nonlinear neutral difference equations of the form ∆ (xn − xn−h) + qn|xn−g| sgn xn−g = 0, i = 1, 2, 3 and c > 0, are established.

this paper deals with an i * corresponding author email address:   nventory system with one central warehouse and a number of identical retailers. we consider perishable-on-the-shelf items; that is, all items have a fixed shelf life and start to age on their arrival at the retailers. each retailer faces poisson demand and employs (1, t) inventory policy. although demand n...

a memory control for t-s fuzzy discrete-time systems with sto- chastic input delay is proposed in this paper. dierent from the common assumptions on the time delay in the existing literatures, it is assumed in this paper that the delays vary randomly and satisfy some probabilistic dis- tribution. a new state space model of the discrete-time t-s fuzzy system is derived by introducing some stocha...

the term divine favor in mullā ṣadrā’s transcendental philosophy means divine essential knowledge that is the origin of objective actualization of action and the best order. in addition, divine knowledge is also considered as common between the essential and actual attributes. therefore, divine knowledge can be analyzed in terms of essential (divine knowledge) and actual (the best order). the m...

Objectives: Amblyopia is most common binocular vision anomalies. To comprise is decrease of visual acuity witch doesnchr('39')t remove by optical correction. Nowadays because of the psychosocial problem with amblyopia, is a functional disability. Awareness of parents of children with amblyopic life experience, when facing with curing system can provide effective for promotion of self-assessment...