Within the framework of △-ontology, where the primitive element is the infinium ℑ = △₁ₓ₁ (a right isosceles triangle with legs 1 and hypotenuse √2), a complete formal proof of the Riemann Hypothesis is constructed. The proof is structured as a sequence of eight logically independent steps: from the construction of the shift operator U and the Laplacian Δ, through the combinatorial theory of △-mosaics and the connection with the Euler product, to the derivation of the critical line Re(s) = 1/2. Each step is accompanied by an explanatory commentary and an explicit status of its formal verification. All components of the proof are fully formalized in Lean 4.
Alexey (KAMAZ) Petrov (Tue,) studied this question.