Cycle decompositions: from graphs to continua

Details Cycle decompositions: from graphs to continua Cycle decompositions: from graphs to continua

2010-03-26

arxiv.org/abs/1003.5115v4

Mathematics

General Topology

Advances in Mathematics (2011)

Scientific paper

10.1016/j.aim.2011.10.015

We generalise a fundamental graph-theoretical fact, stating that every element of the cycle space of a graph is a sum of edge-disjoint cycles, to arbitrary continua. To achieve this we replace graph cycles by topological circles, and replace the cycle space of a graph by a new homology group for continua which is a quotient of the first singular homology group $H_1$. This homology seems to be particularly apt for studying spaces with infinitely generated $H_1$, e.g. infinite graphs or fractals.

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