# 📐 L2 Spec — Hyperelasticity — large-deformation rubber-like Mismatch-Only Spec
**ID:** `L2-215-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-215`](/artifact/l1/L1-215)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41554014
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| N dof | — | 100 – 1000000 |
| Snr db | dB | 0 – 40 |
| Mu error | — | 0.0 – 0.1 |
| N sensors | — | 4 – 4096 |
| Bulk modulus error | — | 0.0 – 0.1 |
| Param choice error | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
16.0 + 0.3*SNR_dB - 25.0*mu_error - 20.0*bulk_modulus_error - 10.0*param_choice_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`128513011fee8baa0667d46af4ecac0b7642da11b9de16f08299ce1c1c0e85f7`
## 5. On-chain Registration
- **Chain hash:** `0xc21e483eb9de4b1024d36de6140a26a201d952be2340dccc9273170b081b8cdb`
- **Chain tx hash:** `0x3894edd5886dfcbd0f980640905e22857ac5a5c2db3a0c6d38f1d74348955daf`
- **Chain block:** `41554014`
---
## File Mapping
This bundle consists of: `L2-215-001.md`, `L2-215-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-215-001.md` | Source of truth — edit this | Human or LLM |
| `L2-215-001.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 `L2-215-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._