Pith Number

pith:AY2RYV7V

pith:2025:AY2RYV7V75NGA5QUTPZFGQLQQ4

not attested not anchored not stored refs pending

Layer-Aware Representation Filtering: Purifying Finetuning Data to Preserve LLM Safety Alignment

Hao Li, Jing Shao, Lei Sha, Lijun Li, Rui Li, Xianyi Wei, Zhenghao Lu

arxiv:2507.18631 v2 · 2025-07-24 · cs.CR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AY2RYV7V75NGA5QUTPZFGQLQQ4}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T11:43:15.041655Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06351c57f5ff5a6076149bf2534170872e9c819859ec37f35302c6976886e7cc

Aliases

arxiv: 2507.18631 · arxiv_version: 2507.18631v2 · doi: 10.48550/arxiv.2507.18631 · pith_short_12: AY2RYV7V75NG · pith_short_16: AY2RYV7V75NGA5QU · pith_short_8: AY2RYV7V

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/AY2RYV7V75NGA5QUTPZFGQLQQ4 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 06351c57f5ff5a6076149bf2534170872e9c819859ec37f35302c6976886e7cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1620b8ceaf4e5ccec2e117b7d5c93f0c39c3067ee927d9d4395ee2dc6511c1b5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2025-07-24T17:59:24Z",
    "title_canon_sha256": "d8083ce27bc1bc58c0eb97399a408512142d74b1ba1837b1fccb201e4e435d77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.18631",
    "kind": "arxiv",
    "version": 2
  }
}