# C1550 — Explain the4940 head separation

## Question

Do the lower and upper differences account for both Noah-partition comparisons?

## Sources

```json
[]
```

## Opened utc

2026-09-29T02:37:40.597565+00:00

## Results

```json
{
  "source_head_gap": 890,
  "source_decomposition": [
    910,
    -20
  ],
  "inverse_decomposition": [
    910,
    4030
  ],
  "Noah_head_gap": 4940,
  "fully_refined_gap": 4940
}
```

## Finding

The source gap890=910−20 becomes inverse4940=910+4030; the common4320 split leaves that difference intact.

## Reassessment

Classify theSP equivalence among its selected partitions.

## Checks

```json
{}
```

## Closed utc

2026-09-29T02:37:40.597995+00:00

## Record provenance

Exact record hash: `d0f8eb7985f4a6298dd67cebbc106a69254749998970e35d25436c8b79ad3bdd`

Source journal: `Research_Cycles/C1483_C1582/c1483_c1582/journal.json`