GC
2007
Springer
14 years 12 days ago
2007
Springer
Let H be a multigraph and G a graph containing a subgraph isomorphic to a subdivision of H, with S ⊂ V (G) (the ground set) the image of V (H) under the isomorphism. We consider...
GC
2007
Springer
14 years 12 days ago
2007
Springer
GC
2007
Springer
14 years 12 days ago
2007
Springer
We localize and strengthen Katona’s idea of an edge-toughness to a local topological toughness. We disprove a conjecture of Katona concerning the connection between edgetoughnes...
GC
2007
Springer
14 years 12 days ago
2007
Springer
Let G be a connected graph of order n and girth g. If dG(u) + dG(v) ≥ n − 2g + 5 for any two non-adjacent vertices u and v, then G is up-embeddable. Further more, the lower bou...
GC
2007
Springer
14 years 12 days ago
2007
Springer
GC
2007
Springer
14 years 12 days ago
2007
Springer
Two graphs G1 and G2 of order n pack if there exist injective mappings of their vertex sets into [n], such that the images of the edge sets do not intersect. Sauer and Spencer prov...
GC
2007
Springer
14 years 12 days ago
2007
Springer
Let Γ be a finite digraph and let G be a subgroup of the automorphism group of Γ. A directed cycle C of Γ is called G-consistent whenever there is an element of G whose restri...
GC
2007
Springer
14 years 12 days ago
2007
Springer
GC
2007
Springer
14 years 12 days ago
2007
Springer
GC
2007
Springer
14 years 12 days ago
2007
Springer
Let Qn be a hypercube of dimension n, that is, a graph whose vertices are binary n-tuples and two vertices are adjacent iff the corresponding n-tuples differ in exactly one posit...