Pith Number

pith:CQJRV3C4

pith:2020:CQJRV3C4GFON6PQJTGK7GZ24YS

not attested not anchored not stored refs pending

The Population III origin of GW190521

Boyuan Liu, Volker Bromm

arxiv:2009.11447 v2 · 2020-09-24 · 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{CQJRV3C4GFON6PQJTGK7GZ24YS}

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	2026-07-05T01:52:27.515716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

14131aec5c315cdf3e099995f3675cc4a82b044c46a522b9dc5ef1cc8d8af72c

Aliases

arxiv: 2009.11447 · arxiv_version: 2009.11447v2 · doi: 10.48550/arxiv.2009.11447 · pith_short_12: CQJRV3C4GFON · pith_short_16: CQJRV3C4GFON6PQJ · pith_short_8: CQJRV3C4

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/CQJRV3C4GFON6PQJTGK7GZ24YS \
  | 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: 14131aec5c315cdf3e099995f3675cc4a82b044c46a522b9dc5ef1cc8d8af72c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c45db2d2ee9c507a03efeabf51a43d5b4376ec509d957865ba672492739a2823",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-09-24T01:53:14Z",
    "title_canon_sha256": "0e2b36a535bcbcafea25264ee4fea7d18fa5f477ad4efe9f80f3f5fb5b807866"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.11447",
    "kind": "arxiv",
    "version": 2
  }
}