Pith Number

pith:WQ7WIUJY

pith:2006:WQ7WIUJYCWLWYNVXJLMIDSD67Y

not attested not anchored not stored refs pending

Two populations of metal-free stars in the early Universe

Thomas H. Greif, Volker Bromm

arxiv:astro-ph/0604367 v4 · 2006-04-18 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WQ7WIUJYCWLWYNVXJLMIDSD67Y}

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	2026-07-04T16:58:36.679846Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b43f64513815976c36b74ad881c87efe10608536a9dc7ef92e2ec01e2ec1c86f

Aliases

arxiv: astro-ph/0604367 · arxiv_version: astro-ph/0604367v4 · doi: 10.48550/arxiv.astro-ph/0604367 · pith_short_12: WQ7WIUJYCWLW · pith_short_16: WQ7WIUJYCWLWYNVX · pith_short_8: WQ7WIUJY

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/WQ7WIUJYCWLWYNVXJLMIDSD67Y \
  | 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: b43f64513815976c36b74ad881c87efe10608536a9dc7ef92e2ec01e2ec1c86f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31e626d5f40756378c5b5a0d5756035337e6844b928ae87bc1e6cbf29d6e623f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2006-04-18T15:13:19Z",
    "title_canon_sha256": "4405270de9f35937fd5cbf63d90388e85055d6bb35f4aaf8f12027f014376e92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0604367",
    "kind": "arxiv",
    "version": 4
  }
}