{ "id": "1602.07400", "version": "v1", "published": "2016-02-24T05:07:49.000Z", "updated": "2016-02-24T05:07:49.000Z", "title": "3-regular colored graphs and classification of surfaces", "authors": [ "Biplab Basak" ], "comment": "9 pages, 8 figures", "categories": [ "math.CO" ], "abstract": "Motivated by the theory of crystallizations, we consider an equivalence relation on the class of $3$-regular colored graphs and proved that up to this equivalence $(a)$ there exists a unique contracted 3-regular colored graph if the number of vertices is $4m$ and $(b)$ there are exactly two such graphs if the number of vertices is $4m+2$ for $m\\geq 1$. Using this, we present a simple proof of the classification of closed surfaces.", "revisions": [ { "version": "v1", "updated": "2016-02-24T05:07:49.000Z" } ], "analyses": { "subjects": [ "05C15", "05C10", "57Q15", "57N05", "57Q05" ], "keywords": [ "classification", "equivalence relation", "regular colored graphs", "simple proof" ], "note": { "typesetting": "TeX", "pages": 9, "language": "en", "license": "arXiv", "status": "editable" } } }