HA + independent Lean evidence · Research, not Alpha admission

AP022 — factorial atanh prefix

Full irrationality (IR072/G121) remains open. Stable: 432. Alpha v35: 4,318. This checkpoint changes neither catalogue.

Exact named statement

forall N. exists d ab ac. Factorial(N,d) /\ (~d=0 /\ (NatAtanhPrefix(d,ab,ac,N) /\ NatZeroBefore(ab,ac,N,1)))

ND0425 — NatAtanhPrefix · ND0408 — NatZeroBefore · PD0023 — Factorial

Fully expanded target AST

Complete certificate and independent checks

124 actual local proof nodes. Each node carries its complete ordinary HA proof body.

Full canonical proof bundle · Original HA receipt · Independent Lean receipt

Target SHA-256: 717987b66df365b93849f2f28931c0d8b1ef892d210f4590b9c62997aee7989a
Bundle SHA-256: e60cea590e8fc2dcd2f130c163423b166de275b0d0af5036748f9e0bd034d9f5

Checked statement containment

These exact targets occur inside this certificate. These links summarize containment, not direct dependency arrows; the downloadable bundle records every private lemma and ordered edge.

Scope

construct the actual positive factorial N as the prescribed logarithm coefficient scale and the actual coefficient prefix using a proved positive divisor induction and existing prefix construction without claiming the whole canonical PR approximation trace

None of these finite arithmetic statements closes an IR campaign parent. The analytic identification, interpolation and final positive irrationality certificate remain open.