Pith Number

pith:UNU3YZ2R

pith:2003:UNU3YZ2RRV5U7GCXRETBAUH4TF

not attested not anchored not stored refs pending

Was the Universe Reionized by Massive Population-III Stars?

Abraham Loeb, Stuart Wyithe

arxiv:astro-ph/0302297 v2 · 2003-02-17 · 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{UNU3YZ2RRV5U7GCXRETBAUH4TF}

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	2026-05-18T01:40:39.369342Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a369bc67518d7b4f985789261050fc997d572e0b55ecbfd181d7afa334890e68

Aliases

arxiv: astro-ph/0302297 · arxiv_version: astro-ph/0302297v2 · doi: 10.48550/arxiv.astro-ph/0302297 · pith_short_12: UNU3YZ2RRV5U · pith_short_16: UNU3YZ2RRV5U7GCX · pith_short_8: UNU3YZ2R

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/UNU3YZ2RRV5U7GCXRETBAUH4TF \
  | 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: a369bc67518d7b4f985789261050fc997d572e0b55ecbfd181d7afa334890e68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78659f162e66a16f9472e92813f6c6916591531d382903bd0d6e50ed58a8b231",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-02-17T06:47:54Z",
    "title_canon_sha256": "961e0445060512afa4faa11723e3209ae1d95d33d4d6ab339bab8ca8bf1bc67b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0302297",
    "kind": "arxiv",
    "version": 2
  }
}