The 4900-year translation joins the Babylonian and Jubilee comparisons
Independent follow-up to the fixed six-spine study. This note checks only the three named interval pairs proposed by the parent researcher; it introduces no endpoint search or new construction.
Exact paired translations
| Interval | Source roles | Forward translation from preceding row | Width |
|---|---|---|---|
| 6346 BC → 1446 BC | LXX ordinary Cumulative Shem → Exodus | — | 4900 |
| 5436 BC → 536 BC | MT ordinary Cumulative Shem, also SP completed inverse Cumulative Flood → restoration | 910 at both endpoints | 4900 |
| 4836 BC → AD 65 | MT ordinary Cumulative Flood, retained as Conquest-held inverse Cumulative Flood → AD 65 | 600 civil years at both endpoints | 4900 |
The first translation is already source-backed in the comparative study §4.1: 6346−5436 = 1446−536 = 910. The next translation follows the ordinary MT serial Shem life:
Thus the same 600 years carry MT cumulative Shem to its cumulative Flood boundary and restoration 536 BC to AD 65. In a single civil coordinate system, BC B maps to 1−B and AD A to A. The three endpoint pairs are therefore
all with difference 4900. The combined translation from the LXX row to the final MT row is 1510 at both ends. This is a consequence of the two named constituent translations.
The 600 belongs to the Cumulative serial-lifespan domain. It does not import Regular Shem's 598/600/602 Gear alternatives or add a new Gear motion.
Why it advances the larger explanation
The 4900 width formerly shown on the Babylonian side as 5436→536 is exactly the final ten-Jubilee component of the SP Regular inverse-Flood chain 11206→4836→AD 65:
Its 4900 component carries the appointed Conquest division 4836→1406→AD 65, or 7+3 Jubilees. This identifies the bridge between the Babylonian and Jubilee sections through the named MT Shem→Flood transition and the named restoration→AD 65 transition. It is stronger exposition than merely observing another repeated factor: the two endpoints move together by a source lifespan.
All three MSS participate with explicit roles: LXX supplies cumulative Shem in the Exodus row; the middle coordinate 5436 is both MT cumulative Shem and SP's completed inverse cumulative Flood; MT supplies the final self-retained cumulative inverse Flood 4836. Coordinate equality does not identify the persons or modes.
Concise proposed report paragraph
The 4900-year Babylonian interval also reaches the Jubilee chain by a named translation. LXX cumulative Shem 6346→Exodus 1446 shifts forward 910 at both endpoints to MT cumulative Shem 5436→restoration 536. A further 600-year civil translation gives MT cumulative Flood 4836→AD 65, because 5436−4836 = 536+65−1 =600. All three intervals remain 4900. The middle coordinate 5436 is also the SP completed inverse cumulative Flood, and 4836 is the MT Conquest-held inverse cumulative Flood. Thus Shem's serial 600 years connect the Babylonian 4900 to the final ten Jubilees of SP 11206→MT 4836→AD 65.
Counting note
The three rows above all use ordinary civil elapsed counting, without a year zero. The separate approved 5436 BC→536 BC forward 2700 Rounded translation to 2736 BC→Rounded AD 2166 remains under its Rounded BC+AD−2 rule. The two translated displays should retain their counting labels. In particular, do not describe 4836 BC→AD 65 and 2736 BC→Rounded AD 2166 as a further 2100-year civil translation of each other: their displayed AD labels differ by 2101, while their Rounded/civil widths each retain 4900 under their declared conventions. No deeper mirror analysis is needed to make the present civil bridge.
Verification
Source consulted: c1483_c1582/evidence/Comparative_Study.md, §4.1, and the current reader through C1584, “Inverse Flood nodes join the Jubilee and Babylonian paths.” The standalone companion JSON records the endpoints, coordinates, two translations, widths, and eight exact arithmetic checks.