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» An edge colouring of multigraphs
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CSJM
2007
60views more  CSJM 2007»
13 years 7 months ago
An edge colouring of multigraphs
We consider a strict k-colouring of a multigraph G as a surjection f from the vertex set of G into a set of colours {1,2,. . . ,k} such that, for every non-pendant vertex x of G, ...
Mario Gionfriddo, Alberto Amato
ENTCS
2008
98views more  ENTCS 2008»
13 years 7 months ago
A Rewriting Calculus for Multigraphs with Ports
In this paper, we define labeled multigraphs with ports, a graph model which specifies connection points for nodes and allows multiple edges and loops. The dynamic evolution of th...
Oana Andrei, Hélène Kirchner
DM
2008
127views more  DM 2008»
13 years 7 months ago
An adjacency lemma for critical multigraphs
In edge colouring it is often useful to have information about the degree distribution of the neighbours of a given vertex. For example, the well known Vizing's Adjacency Lem...
David Cariolaro
DM
1998
68views more  DM 1998»
13 years 7 months ago
Alternating cycles and trails in 2-edge-coloured complete multigraphs
We consider edge-coloured multigraphs. A trail in such a multigraph is alternating if its successive edges differ in colour. Let G be a 2-edge-coloured complete graph and let M b...
Jørgen Bang-Jensen, Gregory Gutin
CORR
2007
Springer
116views Education» more  CORR 2007»
13 years 7 months ago
Frugal Colouring of Graphs
A k-frugal colouring of a graph G is a proper colouring of the vertices of G such that no colour appears more than k times in the neighbourhood of a vertex. This type of colouring...
Omid Amini, Louis Esperet, Jan van den Heuvel