# C863 — Derive the local generator of the NT–MT field

## Question

Does a terminal value plus every local difference reconstruct the whole comparison?

## Inputs

```json
{}
```

## Sources

```json
[
  "C862 complete named field"
]
```

## Opened utc

2026-09-28T02:43:36.769039+00:00

## Results

```json
{
  "generator": {
    "path": "model/NT_MT_edge_generator.json",
    "sha256": "cd68ef6b5e218c258dc3ff30d648772d33404f38860df5085feb5f154472ad64",
    "bytes": 2884
  },
  "Cainan_contraction": {
    "from": "Arphaxad",
    "to": "Shelah",
    "NT_edge": 140,
    "MT_edge": 35,
    "difference": 105
  },
  "Noah_edge": {
    "from": "Noah",
    "to": "Shem",
    "NT_edge": 70,
    "MT_edge": 500,
    "difference": -430
  }
}
```

## Finding

All 22 differences are generated by G_i−G_next=NT_edge−MT_edge and terminal1710. The sole 140-year NT shared-name edge records the intervening Cainan; the Noah edge explains the −430 local change.

## Reassessment

Restore the admitted MT Cainan explicitly and compare the two edge measures.

## Checks

```json
{
  "all_reconstructed": true,
  "unique_double_edge": true,
  "Noah": true
}
```

## Closed utc

2026-09-28T02:43:36.769593+00:00

## Record provenance

Exact record hash: `37cec6797f0ceb696df7a2ddd1f8c657114f23833566351a15f0657e4ddc19ca`

Source journal: `Research_Cycles/C0832_C0931/journal.json`