Sequential Definitions of Connectedness

Details Sequential Definitions of Connectedness Sequential Definitions of Connectedness

2011-05-11

arxiv.org/abs/1105.2203v2

Mathematics

General Topology

This paper has been withdrawn by the author since it will be published in Applied Mathematics Letter which is not open acces j

Scientific paper

A topological group $X$ is called connected if the only subsets which are both open and closed are the whole space $X$ and the null set $\emptyset$. A subset of a topological group is connected if the subspace is connected. We say that a subset $A$ of $X$ is $G$-sequentially connected if the only subsets of $A$ which are both $G$-sequentially open and $G$-sequentially closed, with respect to the relative $G$-sequentially open and $G$-sequentially closed subsets of $A$, are open and closed subsets of $A$ are $A$ and the null set, $\emptyset$. We investigate the impact of changing the definition of convergence of sequences on the structure of sequential connectedness of subsets of $X$ via sequential closure of sets in the sense of $G$-sequential closure. Sequential connectedness for topological groups is a special case of this generalization when G = lim.

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