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COMBINATORICS
2004
13 years 4 months ago
2004
A positive list (list of positive integers) is protographic if its merger with all but finitely many positive graphic lists is graphic. Define the family Ps of s-protogaphic lists...
GD
2005
Springer
13 years 10 months ago
2005
Springer
In this paper we investigate the problem of drawing metro maps which is defined as follows. Given a planar graph G of maximum degree 8 with its embedding and vertex locations (e.g...