Results 131 to 140 of about 7,403 (166)

Appendicitis after endoscopic band ligation for massive ileocecal hemorrhage. [PDF]

open access: yesDEN Open
Sato H   +8 more
europepmc   +1 more source

The dichromatic number of a digraph

open access: closedJournal of Combinatorial Theory, Series B, 1982
AbstractIn this paper the concept of dichromatic number of a digraph which is a generalization of the chromatic number of a graph is introduced. The dichromatic number of a digraph D is defined as the minimum number of colours required to colour the vertices of D in such a way that the chromatic classes induce acyclic subdigraphs in D.
V. Neumann‐Lara
openalex   +3 more sources

A flow theory for the dichromatic number

open access: closedEuropean Journal of Combinatorics, 2017
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Winfried Hochstättler
openalex   +2 more sources

Towards a flow theory for the dichromatic number [PDF]

open access: closedElectronic Notes in Discrete Mathematics, 2015
Abstract We transfer the ideas of analyzing the chromatic number of a graph using nowhere-zero-coflows and -flows to digraphs and the dichromatic number.
Winfried Hochstättler
openalex   +2 more sources

Dichromatic number of chordal graphs

open access: closedGraphs and Combinatorics
15 pages, 5 ...
Stéphane Bessy   +2 more
openalex   +4 more sources

Spectral radius of digraphs with given dichromatic number

open access: closedLinear Algebra and its Applications, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Huiqiu Lin, Jinlong Shu
openalex   +3 more sources

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