{
 "id": "LIB2-281",
 "entry_version": 7,
 "class": "RETIRED",
 "title": "Superseded cylinder formula for the reactor angle",
 "statement": "The archived reactor-angle prompt proposed an electromagnetic-power arctangent from the Peirce cylinder as its mixing-angle target.",
 "scope": {
  "carrier": null,
  "domain": "The specific L133 cylinder formula and its explicitly named P45 proof prompt, not the later torsion-corrected variant.",
  "group": null,
  "hypotheses": [],
  "physical_target": null,
  "quantifier": null,
  "real_form": null
 },
 "source_labels_as_printed": {
  "math_status": null,
  "attachment": null,
  "scorecard_tier_word": null,
  "pdf_page": null
 },
 "house_tier": null,
 "review_state": "PUBLISHED",
 "scientific_status": "RETIRED",
 "evidence_status": [
  {
   "kind": "registry",
   "availability": "shipped"
  }
 ],
 "primary_source": {
  "component": "Paper 5",
  "section": "§2, Retained reactor-angle expression",
  "pdf_page": 83,
  "quote": "sin2 θ13 = sin4 (π/8)"
 },
 "caution": "The current reactor expression retains an unforced readout premise; replacing the older target does not prove a universal cylinder-model exclusion.",
 "candidate_ids": [
  "C2-006",
  "C2-060"
 ],
 "basis": {
  "pdf_sha256_prefix": "b64ddcd9e16a6dcd",
  "release": "Rev33.1_S369"
 },
 "relationships": [],
 "url": "/library-v2/LIB2-281/",
 "content_sha256": "4ab40033117bf90a9a353bacf693f8d8e3ab15659046f189df8e824b671da059",
 "build_stamp": "BUILD_STAMP S371a · 2026-09-26T22:53Z · master 01d1a5873ede42f5 · cut 9dcc6ce9a8ee3e02"
}