# 📐  L2 Spec — MR Fingerprinting (MRF) Mismatch-Only Spec

**ID:** `L2-060-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-060`](/artifact/l1/L1-060)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41553389

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 64 |
| W | px | 64 |
| Z | — | 4 – 64 |
| Snr db | dB | 0.0 – 30.0 |
| Motion | — | 0.0 – 0.3 |
| N frames | — | 100 – 5000 |
| Partial volume | — | 0.0 – 0.3 |
| B0 inhomogeneity | — | 0.0 – 0.3 |
| Undersampling artifacts | — | 0.0 – 0.5 |

## 2. Tolerance (ε)

**Type:** `fn`

```
10.0 + 0.3 * SNR_dB - 8.0 * B0_inhomogeneity - 10.0 * undersampling_artifacts - 6.0 * partial_volume
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |

## 4. Fingerprint

`bf313675cc5450c9a8d6963ba80397e675938aba3b43000f5e0aa6a86d23b8d0`

## 5. On-chain Registration

- **Chain hash:** `0x26556ba31481ae87f7e379e20fcc254432e505e4d6d70b4963cc13cbfda4bb9b`
- **Chain tx hash:** `0x6b0d1ee264c14c63b788733ebcd892e22adedc962ce0bd5a8e963b3e9c0f258c`
- **Chain block:** `41553389`

---

## File Mapping

This bundle consists of: `L2-060-001.md`, `L2-060-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-060-001.md` | Source of truth — edit this | Human or LLM |
| `L2-060-001.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 `L2-060-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._