{"id": "c213", "title": "C213 — The MT 17-fold center supplies a second fixed reference", "filename": "490d_C213_529_Mirror_Bounded_Step_20260923.md", "role": "Research action", "step": 213, "sha256": "c664d46ffc494a0298499bff2fd58a9f3f9a35233f03b7fb47613c546149680d", "bytes": 2022, "origins": ["C01–C479/reference/490d_C01_C265_Complete_Window_Archive_20260923.zip!/workspace/mirror_C206_C265_529_Expansion_Centers_20260923/C213/490d_C213_529_Mirror_Bounded_Step_20260923.md"], "download": "/sources/c664d46ffc494a0298499bff2fd58a9f3f9a35233f03b7fb47613c546149680d.md", "format": "md", "derived": false, "tags": ["Regular", "Mirror / 529"], "excerpt": "C213 — The MT 17-fold center supplies a second fixed reference\n\n23 September 2026 · Step 8 of 60, continuing C205.\n\nThe retained alternate-MT 17-fold interval has a fixed center 868 years before the initial 13-fold center. As the latter moves, the separation becomes 1167 and then 1492.\n\n| Chain | Fixed MT 17-fold cente", "content": "# C213 — The MT 17-fold center supplies a second fixed reference\n\n23 September 2026 · Step 8 of 60, continuing C205.\n\nThe retained alternate-MT 17-fold interval has a fixed center 868 years before the initial 13-fold center. As the latter moves, the separation becomes 1167 and then 1492.\n\n| Chain | Fixed MT 17-fold center | Successive 13-centers minus MT center |\n|---|---|---|\n| 3 | -3697/2 | [Fraction(868, 1), Fraction(1167, 1), Fraction(1492, 1)] |\n| 5 | -3693/2 | [Fraction(868, 1), Fraction(1167, 1), Fraction(1492, 1)] |\n\nTogether with C212, this gives 868+190=1058 only at the original stage. At later stages the same 1058 gap between the two fixed 17-fold centers is expressed as 1167−109 or 1492−434. These are dependent center partitions of the same fixed separation.\n\n## Evidence and scope\n\nK=529 and r=25/23. BC base B means (B+1)t/Bn BC; reflected AD base A means AD At/(A+1)n. Their civil span is B+A in both seasonal components, with no year zero. Signed paired centers are −B and +A; the center model uses components ±1/4 and restores this separation after dilation. An interval center is geometry, not an event or a proposed universal Mirror axis.\n\nRegular Gears are restricted to Noah/Shem/Flood. Creation and Conquest retain fixed source-field members; no fourth Gear is admitted. Generated coordinates, source-field membership and stored graph incidence are distinct. File_18/File_09 and the frozen C127 graph are unchanged. Earlier N01/N03 qualifications, the missing Shem join, closed primers and unestablished original Reports 11–25 remain unchanged. This packet selectively uses prior evidence; it does not rerun completed campaigns. Assertions and alternative placements are not independent historical witness counts.\n\n**4 step-specific checks and 19 frozen-input checks passed.** Exact inputs, results and predecessor hashes are in the accompanying JSON records; calculation code is in the evidence archive. Source dependencies are identified in the body and frozen in `sources/`.\n", "evidenceLinks": [{"id": "d-68301ab760bfbe2e", "title": "File 18"}, {"id": "d-45851004c5864229", "title": "File 09"}]}