Pith Number

pith:66VWOQ3F

pith:2019:66VWOQ3FHKO7DLHIAWWHSNUDNN

not attested not anchored not stored refs pending

Evolution of Neutral Oxygen During the Epoch of Reionization and its Use in Estimating the Neutral Hydrogen Fraction

Caitlin Doughty, Kristian Finlator

arxiv:1908.08549 v1 · 2019-08-22 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{66VWOQ3FHKO7DLHIAWWHSNUDNN}

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	2026-07-04T23:59:15.372928Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7ab6743653a9df1ace805ac7936836b6189c6fdad69808e9b981debf6a27886

Aliases

arxiv: 1908.08549 · arxiv_version: 1908.08549v1 · doi: 10.48550/arxiv.1908.08549 · pith_short_12: 66VWOQ3FHKO7 · pith_short_16: 66VWOQ3FHKO7DLHI · pith_short_8: 66VWOQ3F

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/66VWOQ3FHKO7DLHIAWWHSNUDNN \
  | 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: f7ab6743653a9df1ace805ac7936836b6189c6fdad69808e9b981debf6a27886

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2b071b50bb0580fb3e1a1084750c27cbf7483d56dac7f8fa114f41af376d45b",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-08-22T18:01:14Z",
    "title_canon_sha256": "23b910c1d49a8a98aec6b3398539cf5fff9a0b222b312555b45054e4a7812e7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.08549",
    "kind": "arxiv",
    "version": 1
  }
}