Pith Number

pith:BV2PUNUJ

pith:2021:BV2PUNUJLWYWDUZSEI42CY4X4F

not attested not anchored not stored refs pending

A compact symmetric radio source born at one-tenth the current age of the Universe

Ailing Wang, J.N.H.S. Aditya, Lang Cui, Tao An, Xiaoyu Hong, Yingkang Zhang

arxiv:2109.10599 v2 · 2021-09-22 · 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{BV2PUNUJLWYWDUZSEI42CY4X4F}

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	2026-07-05T03:53:04.987356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d74fa36895db161d3322239a16397e1464659a501dfe52938332b43a5e80e6e

Aliases

arxiv: 2109.10599 · arxiv_version: 2109.10599v2 · doi: 10.48550/arxiv.2109.10599 · pith_short_12: BV2PUNUJLWYW · pith_short_16: BV2PUNUJLWYWDUZS · pith_short_8: BV2PUNUJ

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/BV2PUNUJLWYWDUZSEI42CY4X4F \
  | 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: 0d74fa36895db161d3322239a16397e1464659a501dfe52938332b43a5e80e6e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f2c55b07092e45e57bb15b626367628acf60b071704bfca113de8dbc0eea8c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-09-22T09:02:22Z",
    "title_canon_sha256": "a3e6e5c484b5cf0a206f70f13b2b89febbcc1dde70be93a897a8f72969afa992"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.10599",
    "kind": "arxiv",
    "version": 2
  }
}