Special Functions: local analytic formalization, 2 November 2026

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SF-LEAN-B02 adds 21 checked Lean declarations. The two functions defined by Block01's recurrence are holomorphic on norm(z)^2<2, can be differentiated term by term, and satisfy

\[ U'(z)=1+U(qz)V(rz),\qquad V'(z)=1+U(az)V(bz),\qquad U(0)=V(0)=0, \]

for labeled positive real scales at most one. Lean also proves odd symmetry and U'(0)=V'(0)=1. The product and derivative identities concern the actual convergent sums; the equations are not assumed as premises.

The registered sources now contain 89 named declarations: 39 in the inherited finite core, 29 in Block01, and 21 in Block02. This counts supporting lemmas, and does not establish full analytic-monograph coverage.

The new module and the preceding coupled module pass warning-as-error compilation, exact axiom audits and same-kernel replay on native Windows Lean 4.34.0-rc2 with the existing Mathlib pin. Only propext, Classical.choice, and Quot.sound appear. The finite core's earlier 39-declaration verification is inherited. Mathematical review here is self-review, not independent review.

The next step is extension and agreement along the strict-contraction radius ladder R → R/max(q,r,a,b), followed by gluing. Analytic uniqueness, reverse coefficient recovery, global Perron growth and full rescaling equivalence remain open. The local result allows scales equal to one and asserts no entire continuation.

The imported README, Lean-status note and finite-core guide remain frozen at their assessed Block01 source hashes. This dated companion and the updated catalogue describe the new scope. Reading PDFs, manuscript sources and earlier formal evidence are unchanged.

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