Approximate symmetries of the Boussinesq equation 

1

V.A. Baikov and S.A. Kordyukova

Spectral properties, including spectral singularities, of a quadratic pencil of Schrödinger operators on the whole real axis     

15

E. Bairamov, Ö. Çakar and A.M. Krall

Some examples of weakly compact, compact, absolutely summing and nuclear operators on the space C[0,1]     

31

D. Popa

An addendum to Popa’s paper     

 53

B.T. Ghaim

Some extremal properties of section spaces of Banach bundles and their duals, II   

57

T. Hõim and D.A. Robbins

On *-essential ideals and biideals of rings with involution     

67

D.I.C. Mendes

Balanced and closed-generated filters in frames   

73

T. Dube

The dual space of an asymmetric normed linear space     

83

L.M. García-Raffi, S. Romaguera, E.A. Sánchez-Pérez

Remarks on (q, p, Y)-summing operators     

97

O. Blasco and T. Signes

On the unboundedness of control operators for bilinear systems   

105

A. Idrissi