HA + independent Lean evidence · Research, not Alpha admission

SQ009 — dyadic sqrt2 square error

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

Exact named statement

forall k d s. DyadicSqrt2(k,d,s) ->
  (~d=0) /\ ((~s=0) /\ ((Le(d,s)) /\ ((Lt(s,2*d)) /\ ((Le(s*s,2*(d*d))) /\ (Le(2*(d*d),s*s+2*(2*d)))))))

PD0001 — Le · PD0002 — Lt · ND0446 — DyadicSqrt2

Fully expanded target AST

Complete certificate and independent checks

53 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: c5d6445cccb9460719eff249437f8849968eaa22bcc68dc2d5615589e7873a0c
Bundle SHA-256: 1189e78e28fb6697459f8f7ff4696adaa4d8f739643e53c11fa82c491066e274

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.

SQ002

Scope

supplied actual dyadic sqrt2 computation has positive denominator and root root range and explicit square residual at most four times denominator no limit or square root identity assumption

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