# 📐  L2 Spec — MINFLUX (minimum-photon single-molecule localization) Mismatch-Only Spec

**ID:** `L2-015-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-015`](/artifact/l1/L1-015)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.45 · **Delta tier:** 5
> **⛓ On-chain block:** 41554158

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 32 – 256 |
| W | px | 32 – 256 |
| L nm | nm | 50 – 500 |
| N beams | — | 4 – 6 |
| Drift nm | nm | 0.0 – 3.0 |
| Background count | — | 0 – 20 |
| Beam position error | — | 0.0 – 3.0 |
| Photons per localization | — | 20 – 500 |

## 2. Tolerance (ε)

**Type:** `fn`

```
0.8 + 0.01 * L_nm + 0.05 * (50 - min(photons_per_localization, 50)) + 0.5 * drift_nm
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.45 |
| Delta tier | 5 |

## 4. Fingerprint

`71aaf3f1d18196cc620abd6eed4c794e9a5445b619ad49d9166345740b7df111`

## 5. On-chain Registration

- **Chain hash:** `0xd64f2cb1d7458fbc013fed688ea7cef7a867a8ca0881b5286d1674919195ef11`
- **Chain tx hash:** `0x4909d955a764dd6a28de361cf9f92f3869a5c62886509c786524921641a88d1a`
- **Chain block:** `41554158`

---

## File Mapping

This bundle consists of: `L2-015-001.md`, `L2-015-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-015-001.md` | Source of truth — edit this | Human or LLM |
| `L2-015-001.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 `L2-015-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._