Woodin's HOD conjecture

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Let κ\kappa be an uncountable regular cardinal, and let SS be a stationary subset of κ\kappa. We say that κ\kappa is strongly measurable in HOD⁡\operatorname{HOD} with respect to SS if there is some η<κ\eta<\kappa such that (2η)HOD⁡<κ(2^\eta)^{\operatorname{HOD}}<\kappa and no partition of SS into η\eta many sets, all stationary in VV, belongs to HOD⁡\operatorname{HOD}. We say that κ\kappa is ω\omega-strongly measurable in HOD⁡\operatorname{HOD} when this holds for S=κ∩Cof⁡(ω)S=\kappa\cap\operatorname{Cof}(\omega).

HOD conjecture. There is a proper class of regular uncountable cardinals κ\kappa which are not ω\omega-strongly measurable in HOD⁡\operatorname{HOD}.

This is a combinatorial assertion about HOD⁡\operatorname{HOD} and VV, rather than an assertion requiring inner-model constructions. The supplied text attributes the conjecture to Woodin and describes significant consequences if it holds, but gives no resolution.

References

Primary source

Omer Ben-Neria and Yair Hayut, “On ω-Strongly Measurable Cardinals”, arXiv:1911.04568 (2023).

Additional references

2 papers in this index state this conjecture (2014–2019). The statement above is taken from the most recent of them; the others are arXiv:1407.6335.

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