Erdős Problem #707: Sidon Sets and Perfect Difference Sets
Hall's 1947 counterexample predates the problem itself; this paper's counterexample is independent, smaller, and Lean-certified.
Exact FrontierDelta
Scope and record
Occurred: Oct 29, 2026
Delta type: REGISTRY REVISION
Assumptions: VibeMathed verification: lean-verified. Publication: preprint. AI contribution: ai-assisted. VibeMathed editorial classifications, scores, notes, relations, and dataset structure are CC BY 4.0. Source statements and linked content retain their own rights.
Canonical aliases: Erdős Problem #707: Sidon Sets and Perfect Difference Sets · Erdős #707 (1000-dollar prize) · Problem 707
Confidence: Not scored
Registry verification: lean verified · preprint · resolved
Attribution
VibeMathed
registry · event recorded by
ChatGPT (GPT-5)
model · ai model contributor · OpenAI
Boris Alexeev
human · human collaborator
Dustin G. Mixon
human · human collaborator
Lineage and corrections
Corrects Erdős Problem #707: Sidon Sets and Perfect Difference Sets →
Supersedes Erdős Problem #707: Sidon Sets and Perfect Difference Sets →
This event attributed to Boris Alexeev
VibeMathed record: Erdős Problem #707: Sidon Sets and Perfect Difference Sets evidence for this event
This event attributed to ChatGPT (GPT-5)
Erdős Problem #707: Sidon Sets and Perfect Difference Sets parent of this event
Hall's 1947 counterexample predates the problem itself; this paper's counterexample is independent, smaller, and Lean-certified. parent of this event
This event attributed to Dustin G. Mixon
Erdős Problem #707: Sidon Sets and Perfect Difference Sets evidence for this event
Act on this frontier