Pith Number

pith:PD7BCQE4

pith:2008:PD7BCQE4BXJMCV5DTFTD47BQHY

not attested not anchored not stored refs pending

A universal inequality between angular momentum and horizon area for axisymmetric and stationary black holes with surrounding matter

Carla Cederbaum, J\"org Hennig, Marcus Ansorg

arxiv:0805.4320 v1 · 2008-05-28 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PD7BCQE4BXJMCV5DTFTD47BQHY}

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	2026-05-18T04:36:50.532041Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78fe11409c0dd2c157a399663e7c303e1011706bdf60b807f799262989084a1c

Aliases

arxiv: 0805.4320 · arxiv_version: 0805.4320v1 · doi: 10.48550/arxiv.0805.4320 · pith_short_12: PD7BCQE4BXJM · pith_short_16: PD7BCQE4BXJMCV5D · pith_short_8: PD7BCQE4

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/PD7BCQE4BXJMCV5DTFTD47BQHY \
  | 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: 78fe11409c0dd2c157a399663e7c303e1011706bdf60b807f799262989084a1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bdcb35a45ef6552c30f448730013ed4b9b0b76bce8b957bd3460f973ef7a6338",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2008-05-28T11:58:37Z",
    "title_canon_sha256": "14bdddaa0e6d5996416b57771ad4e9b4d54d87396de233a0222b0abe534a3ca1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0805.4320",
    "kind": "arxiv",
    "version": 1
  }
}