1. Parallel axiom in convexity lattices

   • L. O. Libkin

   OriginalPaper Pages: 1 - 12

2. On the periodic solutions of certain class of seventh-order differential equations

   • H. Bereketoglu

   OriginalPaper Pages: 13 - 22

3. Strong semi-simplicity

   • B. J. Gardner

   OriginalPaper Pages: 23 - 35

4. A generalization of Dirac’s theorem for K(1,3)-free graphs

   • R. J. Faudree
   • R. J. Gould
   • T. E. Lindquester

   OriginalPaper Pages: 37 - 54

5. Prime modules of a gamma ring

   • G. L. Booth
   • N. J. Groenewald

   OriginalPaper Pages: 55 - 62

6. Book reviews

   • A. Lee
   • I. Bihari
   • V. Totik

   BookReview Pages: 63 - 72