It was known that planar graphs have O(n) subgraphs isomorphic to K3 or K4. This paper characterizes the subgraphs for which such a linear bound holds: they are exactly the 3-connected planar graphs. Please note that the Tech. Rep. version had a bug (in a supposed generalization of the result to nonplanar graph families) which was corrected in the journal version.
(BibTeX -- Citations -- CiteSeer -- ACM DL)
Journals -- Publications -- David Eppstein -- Theory Group -- Inf. & Comp. Sci. -- UC Irvine
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