# 📐 L2 Spec — Criticality Eigenvalue — k-effective calculation Mismatch-Only Spec
**ID:** `L2-356-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-356`](/artifact/l1/L1-356)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41554100
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 32 – 512 |
| W | px | 32 – 512 |
| Z | — | 32 – 512 |
| Snr db | dB | 0 – 40 |
| N groups | — | 1 – 47 |
| Xs error | — | 0.0 – 0.02 |
| Burnup error | — | 0.0 – 0.2 |
| Reflector error | — | 0.0 – 0.05 |
| Power shape error | — | 0.0 – 0.1 |
## 2. Tolerance (ε)
**Type:** `fn`
```
0.001 + 0.05*xs_error + 0.02*reflector_error + 0.005*burnup_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`df846b6c1e7f28f260424d30495add32fc2383b9005c4cf1b50096af5a9c02e2`
## 5. On-chain Registration
- **Chain hash:** `0xa54054a75e93c7a4c375e7f982fd186ae0cb318772b6058a9673c3fb7577935e`
- **Chain tx hash:** `0x6ff6e9df9c74855872dc3bcb65d39de97e51d14604dc3001966abc5636895390`
- **Chain block:** `41554100`
---
## File Mapping
This bundle consists of: `L2-356-001.md`, `L2-356-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-356-001.md` | Source of truth — edit this | Human or LLM |
| `L2-356-001.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 `L2-356-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._