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Adding the constant evasion and constant prediction numbers to Cichoń's maximum

Published 31 Mar 2025 in math.LO | (2503.24185v2)

Abstract: Let $\mathfrak{e}\mathsf{const}_2$ be the constant evasion number, that is, the size of the least family $F\subseteq{}{\omega}2$ of reals such that for each predictor $\pi\colon {}{<\omega}2\to 2$ there is $x\in F$ which is not constantly predicted by $\pi$; and let $\mathfrak{v}_2\mathsf{const}$ be the constant prediction number, that is, the size of the least family $\Pi_2$ of functions $\pi\colon {}{<\omega}2\to 2$ such that for each $x\in{}{\omega}2$ there is $\pi\in\Pi_2$ that predicts constantly $x$. In this work, we show that the constant evasion number $\mathfrak{e}_2{\mathrm{cons}}$ and the constant prediction number $\mathfrak{v}_2\mathsf{const}$ can be added to Cicho\'n's maximum with distinct values.

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