GD
2009
Springer
14 years 2 days ago
2009
Springer
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....
GD
2007
Springer
14 years 1 months ago
2007
Springer
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...