Erdős problem 949 · problems.science

Let $S \subseteq \mathbb{R}$ be a set containing no solutions to $a + b = c$ . Must there be a set $A \subseteq \mathbb{R} \setminus S$ of cardinality continuum such that $A + A \subseteq \mathbb{R}\setminus S$ ?

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FormalConjectures/ErdosProblems/

949.lean

Retained formal statement2 of 2

Let $S\sub \mathbb{R}$ be a Sidon set. Must there be a set $A\sub \mathbb{R}∖S$ of cardinality continuum such that $A + A \sub \mathbb{R}∖S$ ?

FormalConjectures/ErdosProblems/949.leanErdos949.erdos_949.variants.sidon1 lineExact file

1True ↔ ∀ (S : Set ℝ), IsSidon S → ∃ A ⊆ Sᶜ, Cardinal.mk ↑A = Cardinal.continuum ∧ A + A ⊆ Sᶜ

SolvedProved, no gapsformal conjectures

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