Takeuchi Model: A Formal Proof of the Unique Symmetry Point Under A+B=1 and Its Correspondence to the Riemann Hypothesis

We present a formal proof, mechanically verified by the Lean 4 theorem prover, that under the constraints 0<=B<=1 and A+B=1, the value B=1/2 is the unique point at which noise vanishes. B=1/2 is not assumed but derived. GitHub: https://github.com/takeuchi5961/RHp