Formal target: Corpus.Arxiv210400502BarkerSequence.barker_conjecture
Every Barker sequence has length at most $13$.
Exact formal statement
∀ (a : List.{0} Int), Corpus.Arxiv210400502BarkerSequence.IsBarkerSequence a → LE.le.{0} (List.length.{0} a) 13This target is a formal statement, not a proof of the problem.
Environment availability: available.