Upright-Quad Drawing of st-Planar Learning Spaces

  • David Eppstein
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4372)


We consider graph drawing algorithms for learning spaces, a type of st-oriented partial cube derived from antimatroids and used to model states of knowledge of students. We show how to draw any st-planar learning space so all internal faces are convex quadrilaterals with the bottom side horizontal and the left side vertical, with one minimal and one maximal vertex. Conversely, every such drawing represents an st-planar learning space. We also describe connections between these graphs and arrangements of translates of a quadrant.


Outgoing Edge Region Graph Minimal Vertex Graph Drawing Learning Space 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Berlin Heidelberg 2007

Authors and Affiliations

  • David Eppstein
    • 1
  1. 1.Computer Science Department, University of California, Irvine 

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