On the Complexity of Clustered-Level Planarity and T-Level Planarity

Published 25 Jun 2014 in cs.DS and cs.CG | (1406.6533v1)

Abstract: In this paper we study two problems related to the drawing of level graphs, that is, T-LEVEL PLANARITY and CLUSTERED-LEVEL PLANARITY. We show that both problems are NP-complete in the general case and that they become polynomial-time solvable when restricted to proper instances.

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