Pith Number

pith:FNGBDMP4

pith:2022:FNGBDMP4N2OLCUDYNG5MIWBQAN

not attested not anchored not stored refs pending

Testing the black hole area law with Event Horizon Telescope

Deng Wang

arxiv:2207.00846 v1 · 2022-07-02 · gr-qc · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FNGBDMP4N2OLCUDYNG5MIWBQAN}

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	2026-07-05T05:50:43.467409Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b4c11b1fc6e9cb1507869bac458300349763c1bfe473efd27c09d27405cce57

Aliases

arxiv: 2207.00846 · arxiv_version: 2207.00846v1 · doi: 10.48550/arxiv.2207.00846 · pith_short_12: FNGBDMP4N2OL · pith_short_16: FNGBDMP4N2OLCUDY · pith_short_8: FNGBDMP4

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/FNGBDMP4N2OLCUDYNG5MIWBQAN \
  | 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: 2b4c11b1fc6e9cb1507869bac458300349763c1bfe473efd27c09d27405cce57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c76a9fe61b929fe2efc0b13cdfded12f96f63495e842f75989f5445ccdb4785c",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2022-07-02T14:33:36Z",
    "title_canon_sha256": "421cb3531f31e254dfa24a35d9cb058f8618c9da5183c28ae13057d77fe901ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2207.00846",
    "kind": "arxiv",
    "version": 1
  }
}