1. Bridges and Hamiltonian circuits in planar graphs

   • W. T. Tutte

   Expository papers Pages: 1 - 33

2. On alternative functional equations

   • Halina Światak

   Research papers Pages: 35 - 47

3. Chaines maximales de préordres

   • J. C. Arditti
   • Cori

   Research papers Pages: 49 - 54

4. An equational approach to products of relatively regular operators

   • S. R. Caradus

   Research papers Pages: 55 - 62

5. Averaging interpolation on sets with multiplicities

   • M. A. Botto
   • A. Sharma

   Research papers Pages: 63 - 72

6. There are no Golay complementary sequences of length 2.9 ^t

   • Malcolm Griffin

   Research papers Pages: 73 - 77

7. Intersection preserving finite embedding theorems for partial quasigroups

   • Charles C. Lindner

   Research papers Pages: 79 - 90

8. The partially ordered collection of regular ℛ-classes ofS(X)

   • K. D. Magill Jr.
   • S. Subbiah

   Research papers Pages: 91 - 97

9. The cosine functional equation for nilpotent groups

   • Ilie Corovei

   Research papers Pages: 99 - 106

10. On the number of derangements of a sharplyk-ply transitive set of permutations

    • Werner Heise
    • Harald Kunde

    Research papers Pages: 107 - 108

11. Problems and solutions

    OriginalPaper Pages: 109 - 109

12. On an interpolation problem for functions of exponential type

    • Klaus Menke

    Short communications Pages: 111 - 111

13. Eine Charakterisierung quadratischer Formen durch eine Funktionalgleichung

    • Joachim Röhmel

    Short communications Pages: 112 - 112

14. Über die Funktionalgleichungf(f(x)*f(y)) = f(x*y)

    • J. Dhombres
    • J. Spilker

    Short communications Pages: 112 - 113

15. A solution of the functional equation ϕ(x−y)=∑ ₁ ⁿ a_j(x)\(\overline {a_j (j)} \) on a locally compact Abelian group

    • Thomas A. O'Connor

    Short communications Pages: 113 - 114

16. A class of hypertranscendental functions

    • J. H. Loxton
    • A. J. van der Poorten

    Short communications Pages: 114 - 115

17. On the Weierstrass functions, Sigma, Zeta, Pe, and their functional and differential equations

    • Steven B. Bank
    • Robert P. Kaufman

    Short communications Pages: 115 - 117

18. Distributive lattices with an additional unary operation

    • Joel Berman

    Short communications Pages: 118 - 118

19. Regular Polyhedra—Old and New

    • Branko Grünbaum

    Short communications Pages: 118 - 120