Pith Number

pith:5CPSYKFU

pith:2004:5CPSYKFUBR6OVCYED7DDVDBHF4

not attested not anchored not stored refs pending

Charged black holes in quadratic gravity

Dariusz Tryniecki, Jerzy Matyjasek

arxiv:gr-qc/0402098 v1 · 2004-02-24 · 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{5CPSYKFUBR6OVCYED7DDVDBHF4}

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	2026-07-04T16:47:41.748751Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e89f2c28b40c7cea8b041fc63a8c272f1eb7e8ea49c5979de08c0dcf6da52802

Aliases

arxiv: gr-qc/0402098 · arxiv_version: gr-qc/0402098v1 · doi: 10.48550/arxiv.gr-qc/0402098 · pith_short_12: 5CPSYKFUBR6O · pith_short_16: 5CPSYKFUBR6OVCYE · pith_short_8: 5CPSYKFU

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/5CPSYKFUBR6OVCYED7DDVDBHF4 \
  | 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: e89f2c28b40c7cea8b041fc63a8c272f1eb7e8ea49c5979de08c0dcf6da52802

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de5c8f31557b02ce0cc4b69b57de95f3d3d54b5d9544988b04a7556bf2608146",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2004-02-24T09:07:24Z",
    "title_canon_sha256": "f1a2e234098cbc95d222f0730b2d44fd00298f64499f97a9cdbc9368440a1df1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0402098",
    "kind": "arxiv",
    "version": 1
  }
}