## Abstract

I provide simplified proofs for each of the following fundamental theorems regarding selection principles: (1) The Quasinormal Convergence Theorem, due to the author and Zdomskyy, asserting that a certain, important property of the space of continuous functions on a space is actually preserved by Borel images of that space. (2) The Scheepers Diagram Last Theorem, due to Peng, completing all provable implications in the diagram. (3) The Menger Game Theorem, due to Telgársky, determining when Bob has a winning strategy in the game version of Menger's covering property. (4) A lower bound on the additivity of Rothberger's covering property, due to Carlson. The simplified proofs lead to several new results.

Original language | English |
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Pages (from-to) | 478-492 |

Number of pages | 15 |

Journal | Canadian Mathematical Bulletin |

Volume | 67 |

Issue number | 2 |

DOIs | |

State | Published - 23 Jun 2024 |

### Bibliographical note

Publisher Copyright:© The Author(s), 2023. Published by Cambridge University Press on behalf of The Canadian Mathematical Society.

## Keywords

- Hurewicz property.
- Menger property
- Rothberger property
- Selection principles
- quasinormal convergence