Pith Number

pith:AFAU5ULS

pith:2019:AFAU5ULSTNP2PSM4XT7TL73P5Y

not attested not anchored not stored refs pending

External photoevaporation of protoplanetary discs in Cygnus OB2: linking discs to star formation dynamical history

Andrew J. Winter, Cathie J. Clarke, Giovanni P. Rosotti

arxiv:1902.04586 v3 · 2019-02-12 · astro-ph.GA · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AFAU5ULSTNP2PSM4XT7TL73P5Y}

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	2026-05-17T23:53:40.979422Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

01414ed1729b5fa7c99cbcff35ff6fee21187bbbca4ba853751743fda0d4b3fb

Aliases

arxiv: 1902.04586 · arxiv_version: 1902.04586v3 · doi: 10.48550/arxiv.1902.04586 · pith_short_12: AFAU5ULSTNP2 · pith_short_16: AFAU5ULSTNP2PSM4 · pith_short_8: AFAU5ULS

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/AFAU5ULSTNP2PSM4XT7TL73P5Y \
  | 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: 01414ed1729b5fa7c99cbcff35ff6fee21187bbbca4ba853751743fda0d4b3fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "164bab6eb7637ab02721276217e0ab8ac90ba6148ddbaf78700baa1da7d5646b",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-02-12T19:00:02Z",
    "title_canon_sha256": "28e72e8f062fcd303aa05d701c5d4a439f9c2649b788a9d96f80252f2bfd1b4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.04586",
    "kind": "arxiv",
    "version": 3
  }
}