On extreme positive operators between polyhedral cones / Miscellaneous properties of equi-eccentric graphs / On the number of subgraphs of prescribed type of planar graphs with a given number of vertices / Some conditions for digraphs to be Hamiltonian / Covering of vertices of a simple graph with given connectivity and stability number / Embedding Latin squares in Steiner quasigroups, and Howell designs in triple systems / Convexity, graph theory and non-negative matrices / Lattice points and lattice polytopes / A new upper bound for the cardinality of 2-distance sets in Euclidean space / Geodesics in oriented graphs / Recent results on the strong perfect graph conjecture / Iterative methods for the convex feasibility problem / Inequalities involving convex sets and their chords / A symmetrical arrangement of eleven hemi-icosahedra / Regular incidence-complexes and dimensionally unbounded sequences of such, I / Some old and new problems in combinatorial geometry / Pseudo-Boolean functions and their graphs / Valuations of trees, polynomial equations and polytopes / Spectra of trees / The valence-functional / Matroids with weighted bases and Feynman integrals / Balanced pairs / On automorphisms of graphs with forbidden subgraphs

Weakly saturated graphs are rigid / Decomposability of polytopes is a projective invariant / Additive sequences of permutations / On pairs of disjoint segments in convex position in the plane / The decomposition of the [italic]n-sphere and the boundaries of plane convex domains / Bounding the numbers of faces of polytope pairs and simple polyhedra / Parity in the realm of infinite permutations / Non-Hamiltonian simple 3-polytopes with only one type of face besides triangles / At most 2[italic superscript]d+[superscript]1 neighborly simplices in E[italic superscript]d / Some recent results on cycle traversability in graphs / Generalized Hamiltonian paths in tournaments / Large regular factors in random graphs / Techniques for investigating neighborly polytopes / Exchange properties of convexity spaces / Extending Kotzig's theorem : Hensley's lattice polytope theorem / Intersecting diameters in convex bodies / Quadratic forms and graphs / Approximation of convex bodies by polytopes with uniformly bounded valences / Some results on convexity in graphs / Convexity in graphs: achievement and avoidance games / On scheduling the construction of a tree / Edge maps and isomorphisms of graphs / A multiflow problem without the max-flow min-cut property / Polyhedral manifolds with few vertices / Regular polyhedral manifolds / Open problems