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In graph-theoretic mathematics, a cycle double cover is a collection of cycles in an undirected graph that together include each edge of the graph exactly twice. For instance, for any polyhedral graph, the faces of a convex polyhedron that represents the graph provide a double cover of the graph: each edge belongs to exactly two faces.

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  • Cycle double cover (en)
  • Двойное покрытие циклами (ru)
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  • In graph-theoretic mathematics, a cycle double cover is a collection of cycles in an undirected graph that together include each edge of the graph exactly twice. For instance, for any polyhedral graph, the faces of a convex polyhedron that represents the graph provide a double cover of the graph: each edge belongs to exactly two faces. (en)
  • Двойное покрытие циклами в теории графов — множество циклов в неориентированном графе, которое включает в себя каждое ребро ровно два раза. Например, любой полиэдральный граф образован из вершин и рёбер выпуклого многогранника, грани же при этом образуют двойное покрытие циклами: каждое ребро принадлежит ровно двум граням. (ru)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Petersen_double_cover.svg
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  • Cycle Double Cover Conjecture (en)
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  • CycleDoubleCoverConjecture (en)
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  • cs2 (en)
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  • In graph-theoretic mathematics, a cycle double cover is a collection of cycles in an undirected graph that together include each edge of the graph exactly twice. For instance, for any polyhedral graph, the faces of a convex polyhedron that represents the graph provide a double cover of the graph: each edge belongs to exactly two faces. It is an unsolved problem, posed by George Szekeres and Paul Seymour and known as the cycle double cover conjecture, whether every bridgeless graph has a cycle double cover. The conjecture can equivalently be formulated in terms of graph embeddings, and in that context is also known as the circular embedding conjecture. (en)
  • Двойное покрытие циклами в теории графов — множество циклов в неориентированном графе, которое включает в себя каждое ребро ровно два раза. Например, любой полиэдральный граф образован из вершин и рёбер выпуклого многогранника, грани же при этом образуют двойное покрытие циклами: каждое ребро принадлежит ровно двум граням. Дьёрдь Секереш и Пол Сеймур выдвинули гипотезу о двойном покрытии циклами, согласно которой для любого графа без мостов существует двойное покрытие циклами. Эту гипотезу можно эквивалентно переформулировать в терминах вложений графов, и в этой области она также известна как гипотеза о круговом вложении (англ. circular embedding conjecture или strong embedding conjecture). (ru)
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