Pith Number

pith:HL4G72JI

pith:2000:HL4G72JIVOV7OFNF6YFTT7M2BO

not attested not anchored not stored refs pending

Early Metal Enrichment of the Intergalactic Medium by Pregalactic Outflows

Andrea Ferrara, Martin J. Rees, Piero Madau

arxiv:astro-ph/0010158 v2 · 2000-10-09 · 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{HL4G72JIVOV7OFNF6YFTT7M2BO}

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	2026-05-18T04:29:05.273874Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3af86fe928ababf715a5f60b39fd9a0b9499a4201c19efe0d90fca3f98082582

Aliases

arxiv: astro-ph/0010158 · arxiv_version: astro-ph/0010158v2 · doi: 10.48550/arxiv.astro-ph/0010158 · pith_short_12: HL4G72JIVOV7 · pith_short_16: HL4G72JIVOV7OFNF · pith_short_8: HL4G72JI

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/HL4G72JIVOV7OFNF6YFTT7M2BO \
  | 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: 3af86fe928ababf715a5f60b39fd9a0b9499a4201c19efe0d90fca3f98082582

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5287fe6d626e0ffff5b40e0dae55ebeff7e3dcf95193ec8d7a74756abd7a6abe",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-10-09T13:55:43Z",
    "title_canon_sha256": "9d33cd94c5e71076e0720e11b4cd3c60335461984853e7353ba82083bee22b2a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0010158",
    "kind": "arxiv",
    "version": 2
  }
}