Pith Number

pith:ZJ2DT2DY

pith:2013:ZJ2DT2DYLHZY4CU6MZPN7VVLD3

not attested not anchored not stored refs pending

Upper Bound on the First Star Formation History

Alberto Dom\'inguez, Grzegorz M. Madejski, Yasuyuki T. Tanaka, Yoshiyuki Inoue

arxiv:1312.6462 v1 · 2013-12-23 · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZJ2DT2DYLHZY4CU6MZPN7VVLD3}

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	2026-05-18T01:45:42.638011Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca7439e87859f38e0a9e665edfd6ab1ee86606ea21eff846c4bdc3058f58a91f

Aliases

arxiv: 1312.6462 · arxiv_version: 1312.6462v1 · doi: 10.48550/arxiv.1312.6462 · pith_short_12: ZJ2DT2DYLHZY · pith_short_16: ZJ2DT2DYLHZY4CU6 · pith_short_8: ZJ2DT2DY

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/ZJ2DT2DYLHZY4CU6MZPN7VVLD3 \
  | 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: ca7439e87859f38e0a9e665edfd6ab1ee86606ea21eff846c4bdc3058f58a91f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04eb6bd9fedabb186425be8de9e7ab750c6af7f2dde2f90b3a5a8022ee08b105",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-12-23T03:24:15Z",
    "title_canon_sha256": "7d4f6b63265758902781b10c1103fe8f3c5a82b577bc38768d7b296fac2d2062"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.6462",
    "kind": "arxiv",
    "version": 1
  }
}