Tychonoff's theorem for locally compact space and an elementary approach to the topology of path spaces

Details Tychonoff's theorem for locally compact space and an elementary approach to the topology of path spaces Tychonoff's theorem for locally compact space and an elementary approach to the topology of path spaces

2007-04-20

arxiv.org/abs/0704.2802v1

Proceedings of the American Mathematical Society 133(2005), 2761-2770

Mathematics

Operator Algebras

Scientific paper

The path spaces of a directed graph play an important role in the study of graph $\css$. These are topological spaces that were originally constructed using groupoid and inverse semigroup techniques. In this paper, we develop a simple, purely topological, approach to this construction, based on Tychonoff's theorem. In fact, the approach is shown to work even for higher dimensional graphs satisfying the finitely aligned condition, and we construct the groupoid of the graph. Motivated by these path space results, we prove a Tychonoff theorem for an infinite, countable product of locally compact spaces. The main idea is to include certain finite products of the spaces along with the infinite product. We show that the topology is, in a reasonable sense, a pointwise topology.

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