1. Sur l'inégalité∑ [p _i f(p _i ) +q _i f(q _i )] ≦∑ [p _i f(q _i ) +q _i f(p _i )]

   • P. Fischer

   OriginalPaper Pages: 87 - 92

2. On quasilinear differential equations of then-th order

   • Rahmi Ibrahim Ibrahim Abdel Karim

   OriginalPaper Pages: 93 - 103

3. Random regular tournaments

   • J. H. Spencer

   OriginalPaper Pages: 105 - 120

4. Necessary and sufficient Tauberian conditions for the absolute convergence of Fourier series and conjugate series

   • P. Chandra

   OriginalPaper Pages: 121 - 130

5. Remarks to the problem ofn-universal trees

   • A. Földes

   OriginalPaper Pages: 131 - 143

6. On strong semisimplicities of semigroups with zero

   • F. Szász

   OriginalPaper Pages: 145 - 148

7. Valencies of graphs with 1-factors

   • L. Lovász

   OriginalPaper Pages: 149 - 151

8. Order types, trees, and a problem of Erdős and Hajnal

   • Keith J. Devlin

   OriginalPaper Pages: 153 - 160

9. On testing density functions

   • G. Tusnády

   OriginalPaper Pages: 161 - 169

10. Eine Klasse vonp-Gruppen, deren Automorphismengruppenp-Gruppen sind

    • W. Lindenberg

    OriginalPaper Pages: 171 - 183

11. Research problems

    • A. Hajnal
    • P. Erdős

    OriginalPaper Pages: 185 - 185