Pith Number

pith:GPCFRW5Z

pith:2026:GPCFRW5ZQXYWZOZMHFEJHMIJQV

not attested not anchored not stored refs pending

LamPO: A Lambda Style Policy Optimization for Reasoning Language Models

Bowen Deng, Jinghan Li, Liang Zhao, Xinyuan Chen, Yipeng Zhou, Zhe Yuan, Zhiqian Chen

arxiv:2605.21235 v1 · 2026-05-20 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GPCFRW5ZQXYWZOZMHFEJHMIJQV}

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	2026-05-21T01:05:45.025406Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

33c458dbb985f16cbb2c394893b1098546476459af17c8ad69bc58bf8da2e970

Aliases

arxiv: 2605.21235 · arxiv_version: 2605.21235v1 · doi: 10.48550/arxiv.2605.21235 · pith_short_12: GPCFRW5ZQXYW · pith_short_16: GPCFRW5ZQXYWZOZM · pith_short_8: GPCFRW5Z

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/GPCFRW5ZQXYWZOZMHFEJHMIJQV \
  | 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: 33c458dbb985f16cbb2c394893b1098546476459af17c8ad69bc58bf8da2e970

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4ffa184da4e83cc80d825c3d45744fd6480736b9b270034703b221301af217c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-05-20T14:24:11Z",
    "title_canon_sha256": "442150e305d761bf966a7abaaf208294e5340311817fd5beb22ade0a76f3621f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.21235",
    "kind": "arxiv",
    "version": 1
  }
}