# C593 — Generate all196 four-rail interval cells

## Question

Does one civil-coordinate formula account for the complete49-row source grid?

## Inputs

```json
{
  "terminal": 65,
  "rows": 49,
  "g": [
    70,
    72
  ],
  "civil_rail_shifts": [
    -110,
    0
  ]
}
```

## Sources

```json
[
  "File68 §7; Appendix C.1–C.10"
]
```

## Opened utc

2026-09-28T00:22:54.583460+00:00

## Results

```json
{
  "interval_cells_matched": 196,
  "boundary_rule": "a(j)=65−(49−j)g+r",
  "civil_coordinates": "a(B BC)=1−B; a(AD A)=A",
  "terminal_original_BC": 46
}
```

## Finding

One indexed rule recovers the complete49-row four-rail field, including the era crossing without a civil year zero. The rows are schematic carriers, not equal biological generations.

## Reassessment

Determine the commutation and convergence laws of the full grid.

## Checks

```json
{
  "coverage": true,
  "terminal": true
}
```

## Closed utc

2026-09-28T00:22:54.584616+00:00

## Record provenance

Exact record hash: `aeec00d30e3b1fc7acd74f1e906b0b4429379aeb5018f810e84f4301730c6b55`

Source journal: `Research_Cycles/C0532_C0631/journal.json`