Pith Number

pith:NU2VLAIN

pith:2004:NU2VLAIN3IJ452BSEAPYNGZYEC

not attested not anchored not stored refs pending

Cosmic Star Formation, Reionization, and Constraints on Global Chemical Evolution

Elisabeth Vangioni-Flam, Frederic Daigne, Jean Audouze, Joseph Silk, Keith A. Olive

arxiv:astro-ph/0405355 v2 · 2004-05-18 · 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{NU2VLAIN3IJ452BSEAPYNGZYEC}

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	2026-07-04T15:49:35.246797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d3555810dda13cee832201f869b3820a14eacde8a4c0097f12cbdc6c6259f98

Aliases

arxiv: astro-ph/0405355 · arxiv_version: astro-ph/0405355v2 · doi: 10.48550/arxiv.astro-ph/0405355 · pith_short_12: NU2VLAIN3IJ4 · pith_short_16: NU2VLAIN3IJ452BS · pith_short_8: NU2VLAIN

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/NU2VLAIN3IJ452BSEAPYNGZYEC \
  | 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: 6d3555810dda13cee832201f869b3820a14eacde8a4c0097f12cbdc6c6259f98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1135b669e29fcc570452cfd43b43e3091e4830250b594609e08badba5f6ea3ab",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-05-18T20:00:04Z",
    "title_canon_sha256": "7f069b05c3c51508942d36669cbfb17d658cd8956e8e872ea60a0f60d9cb762a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0405355",
    "kind": "arxiv",
    "version": 2
  }
}