Pith Number

pith:7PCG2ZDF

pith:2012:7PCG2ZDF5QMJ4SUQTTCRQCZBPA

not attested not anchored not stored refs pending

The Campanelli-Lousto and veiled spacetimes

INFN Trento), Luciano Vanzo, Sergio Zerbini (University of Trento, Valerio Faraoni (Bishop's University)

arxiv:1208.2513 v2 · 2012-08-13 · gr-qc · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7PCG2ZDF5QMJ4SUQTTCRQCZBPA}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:22:29.378055Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fbc46d6465ec189e4a909cc5180b21780728919cc026cbbcbfdbb83c936e6a21

Aliases

arxiv: 1208.2513 · arxiv_version: 1208.2513v2 · doi: 10.48550/arxiv.1208.2513 · pith_short_12: 7PCG2ZDF5QMJ · pith_short_16: 7PCG2ZDF5QMJ4SUQ · pith_short_8: 7PCG2ZDF

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/7PCG2ZDF5QMJ4SUQTTCRQCZBPA \
  | 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: fbc46d6465ec189e4a909cc5180b21780728919cc026cbbcbfdbb83c936e6a21

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cacb8053b9773a4d7d0a7ea0f3b5468dcdd9206933bfd89821bf3f995478f870",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2012-08-13T07:19:19Z",
    "title_canon_sha256": "f327cb1b7c4c3d137908007f83ba80d7268564da28aeef438be14e70ab45f2e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.2513",
    "kind": "arxiv",
    "version": 2
  }
}