Pith Number

pith:DRZPVBAA

pith:2001:DRZPVBAAMA72TQZDROWN4Q6O26

not attested not anchored not stored refs pending

Observables in quantum gravity

Alejandro Perez, Carlo Rovelli

arxiv:gr-qc/0104034 v2 · 2001-04-12 · 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{DRZPVBAAMA72TQZDROWN4Q6O26}

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	2026-05-18T04:24:04.926760Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c72fa8400603fa9c3238bacde43ced79eb16e562973d9edcee1cf50dcdecd7b

Aliases

arxiv: gr-qc/0104034 · arxiv_version: gr-qc/0104034v2 · doi: 10.48550/arxiv.gr-qc/0104034 · pith_short_12: DRZPVBAAMA72 · pith_short_16: DRZPVBAAMA72TQZD · pith_short_8: DRZPVBAA

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/DRZPVBAAMA72TQZDROWN4Q6O26 \
  | 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: 1c72fa8400603fa9c3238bacde43ced79eb16e562973d9edcee1cf50dcdecd7b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4a11bc976c1a617a8b602d569122223bcb971c592c3ec81a8bd786291109e68a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2001-04-12T12:36:06Z",
    "title_canon_sha256": "02ab50f6cbc47d38791fe71ea5f6f2521ae8cf950828395ebcb95dfbd9018d89"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0104034",
    "kind": "arxiv",
    "version": 2
  }
}