Pith Number

pith:JWC5RQ2L

pith:2011:JWC5RQ2LXY6AB5D3BJYZKYMZBZ

not attested not anchored not stored refs pending

Isolated horizons in classical and quantum gravity

Jonathan Engle, Tomas Liko

arxiv:1112.4412 v2 · 2011-12-19 · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JWC5RQ2LXY6AB5D3BJYZKYMZBZ}

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	2026-05-18T03:34:46.164030Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d85d8c34bbe3c00f47b0a719561990e6939ab4699c07f308865b03ae1aa73b7

Aliases

arxiv: 1112.4412 · arxiv_version: 1112.4412v2 · doi: 10.48550/arxiv.1112.4412 · pith_short_12: JWC5RQ2LXY6A · pith_short_16: JWC5RQ2LXY6AB5D3 · pith_short_8: JWC5RQ2L

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/JWC5RQ2LXY6AB5D3BJYZKYMZBZ \
  | 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: 4d85d8c34bbe3c00f47b0a719561990e6939ab4699c07f308865b03ae1aa73b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8637d499dcf49a26f369e759e693268ac00690e38e0d895e692f73fd61e878b2",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-12-19T17:27:26Z",
    "title_canon_sha256": "438522db6c5eadbdff3535a8e93395ce3f2715625de51322b90d1c3dfe0794c3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.4412",
    "kind": "arxiv",
    "version": 2
  }
}