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cycle space
In graph theory, a branch of mathematics, the (binary) cycle space of an undirected graph is the set of its Eulerian subgraphs.
This set of subgraphs can be described algebraically as a vector space over the two-element finite field. The dimension of this space is the circuit rank of the graph. The same space can also be described in terms from algebraic topology as the first homology group of the graph. Using homology theory, the binary cycle space may be generalized to cycle spaces over arbitrary rings.
==Definitions==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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