Quaestiones Mathematicae

Approximate Symmetries of the Boussinesq Equation
pp. 1-14(14)
Authors: Baikov, V.A.; Kordyukova, S.A.

Spectral Properties, Including Spectral Singularities, of a Quadratic Pencil of Schrödinger Operators on the Whole Real Axis
pp. 15-30(16)
Authors: Bairamov, Elgiz; Çakar, Öner; Krall, Allan M.

Some Examples of Weakly Compact, Compact, Absolutely Summing And Nuclear Operators On the Space C [0 , 1]
pp. 31-51(21)
Author: Popa, Dumitru

An Addendum to Popa's Paper
pp. 53-56(4)
Author: Ghaim, Berhane T.

Some Extremal Properties of Section Spaces of Banach Bundles and Their Duals, II
pp. 57-65(9)
Authors: Hoim, Terje; Robbins, D.A.

On *-Essential Ideals and Biideals of Rings with Involution
pp. 67-72(6)
Author: Mendes, D.I.C.

Balanced and Closed-generated Filters In Frames
pp. 73-81(9)
Author: Dube, Themba

The Dual Space of an Asymmetric Normed Linear Space
pp. 83-96(14)
Authors: García-Raffi, L.M.; Sanchez-Pérez, Romaguera

Remarks on (Q, P, Y)-Summing Operators
pp. 97-103(7)
Authors: Blasco, Oscar; Signes, Teresa

On the Unboundedness of Control Operators for Bilinear Systems
pp. 105-123(19)
Author: Idrissi, Abdelali