# 📐 L2 Spec — Potential Flow — irrotational inviscid Mismatch-Only Spec
**ID:** `L2-175-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-175`](/artifact/l1/L1-175)
> **🎯 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 – 2048 |
| W | px | 32 – 2048 |
| Snr db | dB | 0 – 40 |
| Bc error | — | 0.0 – 0.3 |
| Circulation error | — | 0.0 – 0.2 |
| Compressibility correction error | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
19.0 + 0.3*SNR_dB - 20.0*circulation_error - 10.0*bc_error - 5.0*compressibility_correction_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`6092aef32970054100c32b11c46723be8cf609fd03eb07671fe90ec98cdafa18`
## 5. On-chain Registration
- **Chain hash:** `0x1f09c76a47bafadadd3728411aeaa76ba34582c0f6869f0a183f44b143e30cb3`
- **Chain tx hash:** `0x9386865ef8a65b6ca7d505ced53946c2a1196814e92408a30b4fc974cd2d7139`
- **Chain block:** `41553969`
---
## File Mapping
This bundle consists of: `L2-175-001.md`, `L2-175-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-175-001.md` | Source of truth — edit this | Human or LLM |
| `L2-175-001.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 `L2-175-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._