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\(\mathcal{MN}\)-convergence and \(\lim\)-\(\inf_{\mathcal{M}}\)-convergence in partially ordered sets. (English) Zbl 1410.54010

Summary: In this paper, we first introduce the notion of \(\mathcal{MN}\)-convergence in posets as a unified form of \(O\)-convergence and \(O_{2}\)-convergence. Then, by studying the fundamental properties of \(\mathcal{MN}\)-topology which is determined by \(\mathcal{MN}\)-convergence according to the standard topological approach, an equivalent characterization to the \(\mathcal{MN}\)-convergence being topological is established. Finally, the \(\lim\)-\(\inf_{\mathcal{M}}\)-convergence in posets is further investigated, and a sufficient and necessary condition for \(\lim\)-\(\inf_{\mathcal{M}}\)-convergence to be topological is obtained.

MSC:

54A20 Convergence in general topology (sequences, filters, limits, convergence spaces, nets, etc.)
06A06 Partial orders, general

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