## Abstract

We show that any metacompact Moore space is monotonically metacompact and use that result to characterize monotone metacompactness in certain generalized ordered (GO) spaces. We show, for example, that a generalized ordered space with a σ-closed-discrete dense subset is metrizable if and only if it is monotonically (countably) metacompact, that a monotonically (countably) metacompact GO-space is hereditarily paracompact, and that a locally countably compact GO-space is metrizable if and only if it is monotonically (countably) metacompact. We give an example of a non-metrizable LOTS that is monotonically metacompact, thereby answering a question posed by S.G. Popvassilev. We also give consistent examples showing that if there is a Souslin line, then there is one Souslin line that is monotonically countable metacompact, and another Souslin line that is not monotonically countably metacompact.

Original language | English |
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Pages (from-to) | 456-465 |

Number of pages | 10 |

Journal | Topology and its Applications |

Volume | 157 |

Issue number | 2 |

DOIs | |

State | Published - Feb 1 2010 |

## Keywords

- Countably metacompact
- GO-space
- Generalized ordered space
- LOTS
- Metacompact
- Metacompact Moore space
- Metrizable
- Monotonically countably metacompact
- Monotonically metacompact
- σ-Closed-discrete dense set