File:Not upward planar.svg
Summary
| Description |
English: A planar directed acyclic graph that has no upward planar drawing. In a planar DAG with a single source and sink, an upward drawing can exist only if the source and sink are both on the outer face of the drawing, but that is impossible for this graph. |
| Date | |
| Source | Own work |
| Author | David Eppstein |
Licensing
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