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Autohomeomorphisms of pre-images of $\mathbb N^*$

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abstract

In the study of the Stone-\u{C}ech remainder of the real line a detailed study of the Stone-\u{C}ech remainder of the space $\mathbb N\times [0,1]$, which we denote as $\mathbb M$, has often been utilized. Of course the real line can be covered by two closed sets that are each homeomorphic to $\mathbb M$. It is known that an autohomeomorphism of $\mathbb M^*$ induces an autohomeomorphism of $\mathbb N^*$. We prove that it is consistent with there being non-trivial autohomeomorphism of $\mathbb N^*$ that those induced by autohomeomorphisms of $\mathbb M^*$ are trivial.

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math.LO 1

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2024 1

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representative citing papers

Biba's trick, with applications

math.LO · 2024-12-12 · conditional · novelty 8.0

Assuming OCA_T and MA(σ-linked), every homomorphism from P(N) into a quotient by a countably 80-determined ideal has a continuous lifting on a nonmeager ideal, improving PFA-based results and removing MA for countably generated ideals.

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  • Biba's trick, with applications math.LO · 2024-12-12 · conditional · none · ref 4 · internal anchor

    Assuming OCA_T and MA(σ-linked), every homomorphism from P(N) into a quotient by a countably 80-determined ideal has a continuous lifting on a nonmeager ideal, improving PFA-based results and removing MA for countably generated ideals.