# 📐  L2 Spec — Time-Dependent Density Functional Theory (TDDFT) Mismatch-Only Spec

**ID:** `L2-297-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-297`](/artifact/l1/L1-297)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.45 · **Delta tier:** 5
> **⛓ On-chain block:** 41554116

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| Xc | — | B3LYP, CAM-B3LYP, wB97X-D |
| N atoms | — | 2 – 500 |
| N basis | — | 50 – 10000 |
| N states | — | 5 – 500 |

## 2. Tolerance (ε)

**Type:** `fn`

```
0.15 * (1 + 0.1 * mismatch_severity)
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.45 |
| Delta tier | 5 |

## 4. Fingerprint

`59364205e58d09732cdd0463c6b6dfc512ce973fda423e0754047261f7d4a03a`

## 5. On-chain Registration

- **Chain hash:** `0x3aadf6badff048383a29062e68880d671dceaaa0c15d1790a4e1ef9689d1606a`
- **Chain tx hash:** `0x2266cc4db4e9309163f1b39fb1fe3b72c3bfe56f1586f93d3307bf61cc058b60`
- **Chain block:** `41554116`

---

## File Mapping

This bundle consists of: `L2-297-001.md`, `L2-297-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-297-001.md` | Source of truth — edit this | Human or LLM |
| `L2-297-001.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 `L2-297-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._