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GD
2009
Springer
14 years 4 months ago
On the Characterization of Level Planar Trees by Minimal Patterns
We consider characterizations of level planar trees. Healy et al. [8] characterized the set of trees that are level planar in terms of two minimal level non-planar (MLNP) patterns....
Alejandro Estrella-Balderrama, J. Joseph Fowler, S...
GD
2007
Springer
14 years 5 months ago
Minimum Level Nonplanar Patterns for Trees
We add two minimum level nonplanar (MLNP) patterns for trees to the previous set of tree patterns given by Healy et al. [3]. Neither of these patterns match any of the previous pat...
J. Joseph Fowler, Stephen G. Kobourov