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2 results

  • Selection principles and proofs from the Book

  • Part of
  • Boaz Tsaban
  • Journal:
    Canadian Mathematical Bulletin / Volume 67 / Issue 2 / June 2024
    Published online by Cambridge University Press:
    23 November 2023, pp. 478-492
    Print publication:
    June 2024
    • Article
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  • I provide simplified proofs for each of the following fundamental theorems regarding selection principles:

    1. (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. (2) The Scheepers Diagram Last Theorem, due to Peng, completing all provable implications in the diagram.

    3. (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. (4) A lower bound on the additivity of Rothberger’s covering property, due to Carlson.

    The simplified proofs lead to several new results.