1. Congruences on *-Regular Semigroups

   • Siniša Crvenković
   • Igor Dolinka

   OriginalPaper Pages: 1 - 13

2. On the probability that n and [n ^c] are coprime

   • Francine Delmer
   • Jean-Marc Deshouillers

   OriginalPaper Pages: 15 - 20

3. Diophantine m-tuples for linear polynomials

   • Andrej Dujella
   • Clemens Fuchs
   • Robert F. Tichy

   OriginalPaper Pages: 21 - 33

4. Cryptanalysis of a knapsack-like cryptosystem

   • Willi Geiselmann
   • Rainer Steinwandt

   OriginalPaper Pages: 35 - 41

5. Optimal control problems for a class of nonlinear evolution equations

   • Nikolaos Halidias
   • Nikolaos S. Papageorgiou

   OriginalPaper Pages: 43 - 63

6. Expandability radius versus density of a lattice packing

   • A. Heppes

   OriginalPaper Pages: 65 - 71

7. On an additive property of sequences of nonnegative integers

   • Gábor Horváth

   OriginalPaper Pages: 73 - 80

8. On the bounded part of a Hilbert module over a locally C ^*-algebra

   • Maria Joiţa

   OriginalPaper Pages: 81 - 85

9. On arithmetical functions related to the Ramanujan sum

   • Isao Kiuchi
   • Yoshio Tanigawa

   OriginalPaper Pages: 87 - 99

10. Symmetric random walk in random environment in one dimension

    • Katalin Nagy

    OriginalPaper Pages: 101 - 120

11. Hyperperfect numbers

    • John C. M. Nash

    OriginalPaper Pages: 121 - 122

12. 5 dimensional strictly locally homogeneous Riemannian manifolds

    • Vic Patrangenaru

    OriginalPaper Pages: 123 - 129

13. A criterion for finite lattice coverings

    • Uwe Schnell
    • Achill Schürmann

    OriginalPaper Pages: 131 - 134

14. One-sided Tauberian conditions and double sequences

    • U. Stadtmüller

    OriginalPaper Pages: 135 - 146

15. A structure theorem for dismantlable lattices and enumeration

    • N. K. Thakare
    • M. M. Pawar
    • B. N. Waphare

    OriginalPaper Pages: 147 - 160

16. Investigation of the <1,q> point systems

    • Attila Végh

    OriginalPaper Pages: 161 - 166