Pith Number

pith:EFIXDQNH

pith:2014:EFIXDQNHGFY3UYTZ3LODC5EJ3A

not attested not anchored not stored refs pending

The Dark Ages of the Universe and Hydrogen Reionization

Aravind Natarajan, Naoki Yoshida

arxiv:1404.7146 v1 · 2014-04-28 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EFIXDQNHGFY3UYTZ3LODC5EJ3A}

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	2026-05-18T02:48:36.094067Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

215171c1a73171ba6279dadc317489d8032839e4abdeb7c3c01998a9a65711c0

Aliases

arxiv: 1404.7146 · arxiv_version: 1404.7146v1 · doi: 10.48550/arxiv.1404.7146 · pith_short_12: EFIXDQNHGFY3 · pith_short_16: EFIXDQNHGFY3UYTZ · pith_short_8: EFIXDQNH

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/EFIXDQNHGFY3UYTZ3LODC5EJ3A \
  | 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: 215171c1a73171ba6279dadc317489d8032839e4abdeb7c3c01998a9a65711c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54fdff0aac298723a4855f4035cf748bc59bd62ec266b4df3386794046e80376",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-04-28T20:00:26Z",
    "title_canon_sha256": "49e555cf0427091ed3eec963900a4fc8043b571d6b4f7eb504f4f0de908d66bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.7146",
    "kind": "arxiv",
    "version": 1
  }
}