**TOME 53 (101), No. 1, 2010****A. Halanay :**Stability analysis for a mathematical model of chemoterapy action in hematological diseases, p. 3-10**Claudia Muresan :**Dense Elements and Classes of Residuated Lattices, p. 11-24**Cristian Niculescu :**Sufficient optimality conditions and duality in multiobjective fractional programming involving generalized d-type-I functions, p. 25-34**Monica Patriche :**Equilibria for abstract economies in B-convexity, p. 35-49**Pingzhi Yuan and Yongzhong Hu :**On the Diophantine Equation ax² + (3a + 1)^{m}= (4a + 1)^{n}, p. 51-59**Cemil Tunç :**Boundedness analysis for certain two-dimensional differential systems via a Lyapunov approach, p. 61-68**Pham Viet Hai :**An extension of P. Preda, A. Pogan, C. Preda, Timisoara's theorems for the uniformly exponential stability of linear skew-product semiflows, p. 69-83