Pith Number

pith:YSBJZA3Q

pith:2015:YSBJZA3QR4LZFA6S3AS3GIRJ4Z

not attested not anchored not stored refs pending

The First Population II Stars Formed in Externally Enriched Mini-halos

Brian O'Shea, Britton Smith, John Wise, Michael Norman, Sadegh Khochfar

arxiv:1504.07639 v2 · 2015-04-28 · astro-ph.GA · 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{YSBJZA3QR4LZFA6S3AS3GIRJ4Z}

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.

Cited by

1 paper in Pith

Introducing the Lumina project: large-volume radiation-hydrodynamic simulations of the epochs of hydrogen and helium reionization

Receipt and verification

First computed	2026-05-18T01:35:48.245187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c4829c83708f179283d2d825b32229e640f57f06d40226c3c6b23f7a433e8bb1

Aliases

arxiv: 1504.07639 · arxiv_version: 1504.07639v2 · doi: 10.48550/arxiv.1504.07639 · pith_short_12: YSBJZA3QR4LZ · pith_short_16: YSBJZA3QR4LZFA6S · pith_short_8: YSBJZA3Q

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/YSBJZA3QR4LZFA6S3AS3GIRJ4Z \
  | 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: c4829c83708f179283d2d825b32229e640f57f06d40226c3c6b23f7a433e8bb1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6223e787cfe565fa0ed9c595c0cb31c633df5b28a71d4e9f64624190b2a095e",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-04-28T20:01:27Z",
    "title_canon_sha256": "d327c1fd2e51c6917bac64ca1c215a4f6d90e092d9dd8b45523d0a28065ef781"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07639",
    "kind": "arxiv",
    "version": 2
  }
}