2 papers
math.CO2025
A new definition of upward planar order
Ting Li, Xuexing Lu
We give a more coherent definition of upward planar order.
math.CO2025
A composition theory for upward planar orders
Xue Dong, Xuexing Lu, Yu Ye
An upward planar order on an acyclic directed graph is a special linear extension of the edge poset of that satisfies the nesting condition. This order was introduced to co…