Uniform spectral gap for the Syracuse (3n+1) mod-2^k transfer operator, proved elementarily for all scales (cert <= 0.8536). The earlier cycle-elimination claim is retracted (3x-1 control) - see README/THEOREM.md. Not a proof of Collatz.
mathematics proof-assistant dynamical-systems formal-verification number-theory collatz collatz-conjecture 2-adic syracuse mathlib lean4 spectral-gap transfer-operator
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Updated
Sep 9, 2026 - Python