{"id": "c223", "title": "C223 — The midpoint carrier 552→600 belongs to the same ladder", "filename": "490d_C223_529_Mirror_Bounded_Step_20260923.md", "role": "Research action", "step": 223, "sha256": "939f5119fa5c4cc5a26896462431ec680947fe12f756eb66ecc587178f1c4334", "bytes": 1920, "origins": ["C01–C479/reference/490d_C01_C265_Complete_Window_Archive_20260923.zip!/workspace/mirror_C206_C265_529_Expansion_Centers_20260923/C223/490d_C223_529_Mirror_Bounded_Step_20260923.md"], "download": "/sources/939f5119fa5c4cc5a26896462431ec680947fe12f756eb66ecc587178f1c4334.md", "format": "md", "derived": false, "tags": ["Regular", "Mirror / 529"], "excerpt": "C223 — The midpoint carrier 552→600 belongs to the same ladder\n\n23 September 2026 · Step 18 of 60, continuing C205.\n\nThe Creation-to-midpoint widths are 7176=13×552 and 7800=13×600. Their carriers are simply the averages (529+575)/2 and (575+625)/2, and 552×25/23=600.\n\n| Chain | Creation to sourced midpoint | Creation ", "content": "# C223 — The midpoint carrier 552→600 belongs to the same ladder\n\n23 September 2026 · Step 18 of 60, continuing C205.\n\nThe Creation-to-midpoint widths are 7176=13×552 and 7800=13×600. Their carriers are simply the averages (529+575)/2 and (575+625)/2, and 552×25/23=600.\n\n| Chain | Creation to sourced midpoint | Creation to generated midpoint |\n|---|---|---|\n| 3 | 7176 | 7800 |\n| 5 | 7176 | 7800 |\n\nThis places the named first midpoint inside the same 529-centered framework. The number 600 arises here as an average carrier and does not acquire a Noah/Shem biographical role from that arithmetic alone. Its second midpoint endpoint remains generated, as established in C217.\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"}]}