{ "id": "1211.5640", "version": "v1", "published": "2012-11-24T03:15:00.000Z", "updated": "2012-11-24T03:15:00.000Z", "title": "2-Resonant fullerenes", "authors": [ "Rui Yang", "Heping Zhang" ], "comment": "34 pages, 25 figures", "categories": [ "math.CO" ], "abstract": "A fullerene graph $F$ is a planar cubic graph with exactly 12 pentagonal faces and other hexagonal faces. A set $\\mathcal{H}$ of disjoint hexagons of $F$ is called a resonant pattern (or sextet pattern) if $F$ has a perfect matching $M$ such that every hexagon in $\\mathcal{H}$ is $M$-alternating. $F$ is said to be $k$-resonant if any $i$ ($0\\leq i\\leq k$) disjoint hexagons of $F$ form a resonant pattern. It was known that each fullerene graph is 1-resonant and all 3-resonant fullerenes are only the nine graphs. In this paper, we show that the fullerene graphs which do not contain the subgraph $L$ or $R$ as illustrated in Fig. 1 are 2-resonant except for the specific eleven graphs. This result implies that each IPR fullerene is 2-resonant.", "revisions": [ { "version": "v1", "updated": "2012-11-24T03:15:00.000Z" } ], "analyses": { "subjects": [ "05C10", "05C70", "05C90", "92E10" ], "keywords": [ "fullerene graph", "disjoint hexagons", "planar cubic graph", "ipr fullerene", "pentagonal faces" ], "note": { "typesetting": "TeX", "pages": 34, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2012arXiv1211.5640Y" } } }