GD
2009
Springer
13 years 9 months 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
13 years 11 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...