Pith Number

pith:QOBVRV34

pith:2008:QOBVRV34WF3JCU26VWHKQRA5IL

not attested not anchored not stored refs pending

New results for Petrov type D pure radiation fields

Liselotte De Groote, Norbert Van den Bergh

arxiv:0812.1087 v2 · 2008-12-05 · 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{QOBVRV34WF3JCU26VWHKQRA5IL}

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	2026-05-18T02:15:11.749995Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

838358d77cb17691535ead8ea8441d42c184630a8aacdf39e4c5964b0dafc397

Aliases

arxiv: 0812.1087 · arxiv_version: 0812.1087v2 · doi: 10.48550/arxiv.0812.1087 · pith_short_12: QOBVRV34WF3J · pith_short_16: QOBVRV34WF3JCU26 · pith_short_8: QOBVRV34

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/QOBVRV34WF3JCU26VWHKQRA5IL \
  | 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: 838358d77cb17691535ead8ea8441d42c184630a8aacdf39e4c5964b0dafc397

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c5b7ae33b21481411148c065b611f2f15d9c70c2abe69ab863af5b5367fa7c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2008-12-05T08:15:54Z",
    "title_canon_sha256": "e6dcf2e6711bc272c37ed4c22e82edf7c1b327685a2a9a5e08154c4537147565"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.1087",
    "kind": "arxiv",
    "version": 2
  }
}