**International
Journal of Difference Equations (IJDE)**

**Volume
16, Number 1 (2021)**

*CONTENTS*

**An
Inverse Problems for Nonlinear Evolution Equations: Criteria of
Existence of an Invariant Polylinear Controller for a Second-Order
Differential System in a Hilbert Space**

pp. 1-10

V.A. Rusanov, A.V. Daneev, A.V. Lakeyev and Yu.É. Linke

**Laplace Transform of Discriminant for Functions of Second Variable and
its Generalized Form**

pp. 11-17

Hwajoon Kim

**A
Nonlocal (Two-point with Parameters) Boundary Value Problem of
Differential Inclusion**

pp. 19-34

A.M.A.EL-Sayed, W.G.EL-Sayed and Somyya S.Amrajaa

Control of Ball-Plate System with
Observer-Based State-Feedback and Geometric Considerations

pp. 35-46

Khalid Lefrouni, Younes Moubachir and Saoudi Taibi

**
Results on the Existence of Solutions of Sobolev-Type Volterra-Fredholm
Integro-Differential Equations**

pp 47-57

Yogita M. Ahire, Nedal M. Mohammed and Ahmed A. Hamoud

**A
Comparative Study of Approximate Solution of Fifth-order Boundary-value
Problems by Applying HaarWavelets Technique and Galerkin Method with
Quartic B-splines**

pp. 59-79

Kailash Yadav

Subclasses of Univalent Functions
Involving Modified Sigmoid Function

pp 81-93

Olubunmi A. Fadipe-Joseph, M. O. Oluwayemi and E. O. Titiloye

Enhanced Cuckoo Intelligence Search
Algorithm

pp 95-105

Ibukun Isaac Aina, Olumuyiwa James Peter, Abayomi Ayotunde Ayoade,
Festus Abiodun Oguntolu and Matthew Olanrewaju Oluwayemi

New Oscillation Criteria for
Half-Linear Second-Order Neutral Advanced Difference Equations

pp 107-122

P. Selvakumar, P. Gopalakrishnan and A. Murugesan

New Oscillation Conditions for
Second-Order Delay Difference Equations with Several Sub-Linear Neutral
Terms

pp 123-135

C. Soundara Rajan, A. Murugesan and P. Gopalakrishnan

Analysis of HIV Infection of CD4+
T-Cells with Distributed Delays

pp 137-168

A. Anu Priyadharshini , R. Rohini , and K.Krishnan

Efficiency Sample From Some Sampling
Distributions

pp 169-178

Mohammed Elmoudier Mohammed Gobar