Interval representations of planar graphs
Journal of Combinatorial Theory Series B
Small sets supporting fary embeddings of planar graphs
STOC '88 Proceedings of the twentieth annual ACM symposium on Theory of computing
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SIAM Journal on Computing
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Information Processing Letters
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SIAM Journal on Discrete Mathematics
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Theoretical Computer Science
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Journal of Combinatorial Theory Series B
Journal of the ACM (JACM)
SIAM Journal on Computing
Representing graphs by disks and balls (a survey of recognition-complexity results)
Discrete Mathematics
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GD '94 Proceedings of the DIMACS International Workshop on Graph Drawing
WG '92 Proceedings of the 18th International Workshop on Graph-Theoretic Concepts in Computer Science
Rectangular drawings of planar graphs
Journal of Algorithms
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Journal of Algorithms
Rectangular layouts and contact graphs
ACM Transactions on Algorithms (TALG)
GD'10 Proceedings of the 18th international conference on Graph drawing
Triangle contact representations and duality
GD'10 Proceedings of the 18th international conference on Graph drawing
Proportional contact representations of planar graphs
GD'11 Proceedings of the 19th international conference on Graph Drawing
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GD'11 Proceedings of the 19th international conference on Graph Drawing
Linear-time algorithms for hole-free rectilinear proportional contact graph representations
ISAAC'11 Proceedings of the 22nd international conference on Algorithms and Computation
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In this paper, we consider the problem of representing graphs by polygons whose sides touch. We show that at least six sides per polygon are necessary by constructing a class of planar graphs that cannot be represented by pentagons. We also show that the lower bound of six sides is matched by an upper bound of six sides with a linear time algorithm for representing any planar graph by touching hexagons. Moreover, our algorithm produces convex polygons with edges with slopes 0, 1, -1.