The Bulletin of the Belgian Mathematical Society — Simon Stevin aims to publish high level Research Papers in all areas of Mathematics and Expository Papers for a large audience presenting significant aspects of Pure and Applied Mathematics.

### Volume 14, Number 1

#### Publication Date: March 2007

Stability for generalized Jensen functional equations and isomorphisms between $C^*$-algebras

Hark-Mahn Kim; 1-14

On an Elliptic Equation Involving a Kirchhoff Term and a Singular Perturbation

Francisco Julio S.A. Corrêa; 15-24

Algebrability of the set of everywhere surjective functions on $\mathbb{C}$

Richard M. Aron and Juan B. Seoane-Sepúlveda; 25-31

The Dieudonné-Schwartz Theorem for $\mathbf{p}$-adic inductive limits

N. De Grande-De Kimpe and C. Perez-Garcia; 33-50

Ω-Algebras over Henselian Discrete Valued Fields with Real Closed Residue Field

D. F. Bazyleu, J. Van Geel and V. I. Yanchevskiĭ; 51-71

Forced Symmetric Oscillations

Michal Fečkan, Ruyun Ma and Bevan Thompson; 73-85

On a Higher Order Cauchy-Pompeiu Formula for Functions with Values in a Universal Clifford Algebra

Zhang Zhongxiang; 87-97

Orthosymmetrical monotone functions

B. De Baets and K. C. Maes; 99-116

Projective Planes with a Doubly Transitive Projective Subplane

Alessandro Montinaro; 117-134

Almost Derivations on $C^*$-Ternary Rings

Optimal strategies in high risk investments

Krzysztof Szajowski and Daniel Łebek; 143-155

Maximum modulus principles for radial solutions of quasilinear and fully nonlinear singular P.D.E's

Agnieszka Kałamajska and Karol Lira; 157-176

A stability theorem for the index of sphere bundles

Ryuichi Tanaka; 177-182