# 📐 L2 Spec — Digital Mammography Mismatch-Only Spec
**ID:** `L2-036-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-036`](/artifact/l1/L1-036)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41553388
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 2048 |
| W | px | 1664 |
| Kvp | — | 22 – 34 |
| Mas | — | 10 – 400 |
| Scatter | — | 0.0 – 0.3 |
| Pixel um | µm | 25 – 100 |
| Dense tissue overlap | — | 0.0 – 0.5 |
| Compression variation | — | 0.0 – 0.2 |
| Geometric magnification | — | 1.0 – 2.0 |
## 2. Tolerance (ε)
**Type:** `fn`
```
25.0 + 2.0 * log10(mAs / 10) - 8.0 * scatter - 10.0 * dense_tissue_overlap
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`ee870d28bd1285d7cae934a88202a1a21f8169ec8bd70dac49e05ae7ebff12d8`
## 5. On-chain Registration
- **Chain hash:** `0x057312303b8a7642334edc4a9bf87a2af1288d52d60df123488d56eceaecc080`
- **Chain tx hash:** `0x854a808f6364d23b858db242e1ad3601bfc135ca897ee0e1046a6e584a8d72c6`
- **Chain block:** `41553388`
---
## File Mapping
This bundle consists of: `L2-036-001.md`, `L2-036-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-036-001.md` | Source of truth — edit this | Human or LLM |
| `L2-036-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-036-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._