Pith Number

pith:L4DO5SMF

pith:2003:L4DO5SMFPUKSUXONZEYM7TOWSY

not attested not anchored not stored refs pending

Probing the Ionization State of the Universe at z>6

Michael A. Strauss, Richard L. White, Robert H. Becker, Xiaohui Fan

arxiv:astro-ph/0303476 v2 · 2003-03-20 · 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{L4DO5SMFPUKSUXONZEYM7TOWSY}

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	2026-05-18T01:07:33.690746Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f06eec9857d152a5dcdc930cfcdd69630464f642919265980f862fee3424a04

Aliases

arxiv: astro-ph/0303476 · arxiv_version: astro-ph/0303476v2 · doi: 10.48550/arxiv.astro-ph/0303476 · pith_short_12: L4DO5SMFPUKS · pith_short_16: L4DO5SMFPUKSUXON · pith_short_8: L4DO5SMF

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/L4DO5SMFPUKSUXONZEYM7TOWSY \
  | 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: 5f06eec9857d152a5dcdc930cfcdd69630464f642919265980f862fee3424a04

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eda18e0c74af8c0048804660ffae522fccf27f251238ff464184581c992450d7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-03-20T22:04:00Z",
    "title_canon_sha256": "a489d10700be40d254a802da4acfa8ce128d41b370712314c7c208bd06737427"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0303476",
    "kind": "arxiv",
    "version": 2
  }
}