# 📐 L2 Spec — Induced Polarization — chargeability imaging Mismatch-Only Spec
**ID:** `L2-284-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-284`](/artifact/l1/L1-284)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41554068
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 16 – 1024 |
| W | px | 16 – 1024 |
| Z | — | 4 – 256 |
| Snr db | dB | 0 – 40 |
| N timesteps | — | 5 – 500 |
| N quadrupoles | — | 10 – 100000 |
| Cc params error | — | 0.0 – 0.3 |
| Topography error | — | 0.0 – 0.2 |
| Electromagnetic coupling | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
4.0 + 10.0*electromagnetic_coupling + 10.0*cc_params_error + 5.0*topography_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`1ac7abd5e4cf4c86c8ad624e9c53ff2e996c0ba1ccb7c20d9cd2992e97654e4a`
## 5. On-chain Registration
- **Chain hash:** `0x31f2fc1f3bcee225a5f3ee7f245dcc1f563cb3c0fb5f804ff561961e63d691b0`
- **Chain tx hash:** `0xa2f3bcde2e0d2acff68b544314a9708e66395cc913af34c2ff6f1bdbb2122a31`
- **Chain block:** `41554068`
---
## File Mapping
This bundle consists of: `L2-284-001.md`, `L2-284-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-284-001.md` | Source of truth — edit this | Human or LLM |
| `L2-284-001.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 `L2-284-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._