Pith Number

pith:VOYCJ3F2

pith:2025:VOYCJ3F2HOHLPQJQLSISS6QCDC

not attested not anchored not stored refs pending

Constraints on Baryon Density from the Effective Optical Depth of High-Redshift Quasars

Dong-Yao Zhao, Jin Qin, Kang Jiao, Tong-Jie Zhang, Wen-Fei Liu, Yuan-Bo Xie, Zhi-E Liu

arxiv:2501.18182 v1 · 2025-01-30 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VOYCJ3F2HOHLPQJQLSISS6QCDC}

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	2026-07-05T10:07:30.699816Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

abb024ecba3b8eb7c1305c91297a02188960bee4ac4efdf8b6562dfd6dcaa768

Aliases

arxiv: 2501.18182 · arxiv_version: 2501.18182v1 · doi: 10.48550/arxiv.2501.18182 · pith_short_12: VOYCJ3F2HOHL · pith_short_16: VOYCJ3F2HOHLPQJQ · pith_short_8: VOYCJ3F2

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/VOYCJ3F2HOHLPQJQLSISS6QCDC \
  | 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: abb024ecba3b8eb7c1305c91297a02188960bee4ac4efdf8b6562dfd6dcaa768

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88ffc28652660636a1a7271ad2b08f21f6d6bf1a76a085c7205213e9dc4fe262",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2025-01-30T07:24:04Z",
    "title_canon_sha256": "abf61d68eca35161e93b7e0ffa211d8ea0ad8b2f68a49107c48c142ee128634b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.18182",
    "kind": "arxiv",
    "version": 1
  }
}