1. On derivations of algebras with involution

   • Joso Vukman

   OriginalPaper Pages: 181 - 186

2. On the lattice of matric-extensible radicals. II

   • G. L. Booth
   • H. France-Jackson

   OriginalPaper Pages: 187 - 199

3. Adjacency in subposets of the lattice of T₁-topologies on a set

   • Ofelia T. Alas
   • Salvador Hernández
   • Richard G. Wilson

   OriginalPaper Pages: 199 - 219

4. A remark on trigonometric sums

   • Imre Kátai

   OriginalPaper Pages: 221 - 225

5. On the upper radical determined by filial rings

   • M. Filipowicz
   • E. R. Puczylowski

   OriginalPaper Pages: 227 - 236

6. The Jackson interpolation operator and construction of functions

   • Tingfan Xie
   • Xinlong Zhou

   OriginalPaper Pages: 237 - 247

7. On hyperspace topologies via distance functionals in quasi-metric spaces

   • Jiling Cao
   • Jesús Rodríguez-López

   OriginalPaper Pages: 249 - 268