# 📐  L2 Spec — Stokes Flow — low-Re linear viscous Mismatch-Only Spec

**ID:** `L2-173-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-173`](/artifact/l1/L1-173)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41553969

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 32 – 1024 |
| W | px | 32 – 1024 |
| Z | — | 8 – 512 |
| Snr db | dB | 0 – 40 |
| Bc error | — | 0.0 – 0.2 |
| Mu error | — | 0.0 – 0.1 |
| Slip length error | — | 0.0 – 0.3 |

## 2. Tolerance (ε)

**Type:** `fn`

```
21.0 + 0.3*SNR_dB - 30.0*mu_error - 10.0*bc_error - 5.0*slip_length_error
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |

## 4. Fingerprint

`81f90608b4edd2aecaa0113acbb04024a67b74eaf49575ac3418d43884e4746d`

## 5. On-chain Registration

- **Chain hash:** `0x794f1727bc5c3ee23966fef441404c192013cd6dd37bc8a25b75a6d503b17da0`
- **Chain tx hash:** `0xe81e2bc005a00e95a28dcd992fd9b54421869fb21458468f4e315c6d9eda2d66`
- **Chain block:** `41553969`

---

## File Mapping

This bundle consists of: `L2-173-001.md`, `L2-173-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-173-001.md` | Source of truth — edit this | Human or LLM |
| `L2-173-001.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 `L2-173-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._