Pith Number

pith:LDL7AZGF

pith:2016:LDL7AZGFH4VWVQEUTNVSGHHQUC

not attested not anchored not stored refs pending

Models of the Cosmological 21 cm Signal from the Epoch of Reionization Calibrated with Lyman-alpha and CMB Data

Ewald Puchwein (Cambridge), Girish Kulkarni (Cambridge), Martin G. Haehnelt (Cambridge), Tirthankar Roy Choudhury (NCRA)

arxiv:1607.03891 v2 · 2016-07-13 · astro-ph.GA · 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{LDL7AZGFH4VWVQEUTNVSGHHQUC}

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	2026-05-18T01:04:49.595006Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

58d7f064c53f2b6ac0949b6b231cf0a0a8a0fb60f4dd608931862d64ad000515

Aliases

arxiv: 1607.03891 · arxiv_version: 1607.03891v2 · doi: 10.48550/arxiv.1607.03891 · pith_short_12: LDL7AZGFH4VW · pith_short_16: LDL7AZGFH4VWVQEU · pith_short_8: LDL7AZGF

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/LDL7AZGFH4VWVQEUTNVSGHHQUC \
  | 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: 58d7f064c53f2b6ac0949b6b231cf0a0a8a0fb60f4dd608931862d64ad000515

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d5768e26b8ce1ca055522b89b0dade945d2b4ad544154454d63333b6229994c",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-07-13T20:00:00Z",
    "title_canon_sha256": "93fcb315f69da31330c3012443b762ff4a68dbe03838e65835681dedb7a06a7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.03891",
    "kind": "arxiv",
    "version": 2
  }
}