Vol. 55, No. 3, 1998 · Contents

Gheorghe Udrea:
The Diophantine Equations $x^{2}-k=2\cdot T_{n}(\frac{b^{2}\pm2}{2})$

Gheorghe Udrea:
Chebyshev Polynomials and Some Methods of Approximation

R. Cilia and G. Emmanuele:
Lifting of Certain Isomorphic Properties to $\i$

Cícero Lopes Frota and Nickolai Andreevitch Lar'kin:
On a Variational Inequality for the Nonhomogeneous Degenerated Kirchhoff Equation with a Frictional Damping

Louis Roder Tcheugoué Tébou:
On the Decay Estimates for the Wave Equation with a Local Degenerate or Nondegenerate Dissipation

Lucio R. Berrone:
On a Conjecture Relative to the Maximum of Harmonic Functions on Convex Domains: Unbounded Domains

Shilin Yang and Dingguo Wang:
Normal Smash Products

Aissa Guesmia:
Existence Globale et Stabilisation Interne Non Linéaire d'un Système d'Élasticité

Wayne L. McDaniel:
Perfect Squares in the Sequence 3, 5, 7, 11, ...

Paulo Ventura Araújo:
Representation of Curves of Constant Width in the Hyperbolic Plane

Gabriela Hauser Bordalo and Elias Rodrigues:
Complements in Modular and Semimodular Lattices

Gabriela Hauser Bordalo and Elias Rodrigues: