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Source labels openChecked July 26, 2026

Erdős ProblemsNumber theory

Erdős Problem 324

Does there exist a polynomial f(x)Z[x]f(x)\in\mathbb{Z}[x] such that all the sums f(a)+f(b)f(a)+f(b) with a<ba < b nonnegative integers are distinct?

Mathematical statement

Does there exist a polynomial f(x)Z[x]f(x)\in\mathbb{Z}[x] such that all the sums f(a)+f(b)f(a)+f(b) with a<ba < b nonnegative integers are distinct?

Statement source: Erdős Problems statement material

Statement terms: Source-specific

Source-specific terms. Therefore does not assert reuse rights beyond attributed display.

Statement artifacts, not proofs

These records expose exact Lean propositions and statement-only wrappers. Defining a proposition does not supply a proof of it. A placeholder-bearing target also contains no proof. Elaboration checks syntax and types; it does not certify that a formalization perfectly captures every nuance of the informal problem.

Pinned Lean formulation 1

erdos_324

Canonical source
Complete statement target, proof intentionally absentLean 4
theorem erdos_324 : answer(sorry)      f : [X], {(a, b) :  ×  | a < b}.InjOn fun (a, b) => f.eval (a : ) + f.eval (b : ) := by  sorry
Statement source
Formal Conjectures
Lean version
v4.27.0
Placeholder
Present; no proof artifact
Source evidence
Pinned source index
Fidelity review
Community formulation

References