Pith Number

pith:56KK7NRC

pith:1995:56KK7NRCECI3K72ETGVELXL6JL

not attested not anchored not stored refs pending

Quantum Gravity as Topological Quantum Field Theory

John W. Barrett

arxiv:gr-qc/9506070 v2 · 1995-06-28 · gr-qc · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{56KK7NRCECI3K72ETGVELXL6JL}

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	2026-07-04T15:58:49.486232Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef94afb6222091b57f4499aa45dd7e4afb476384961e59171dd602418b112771

Aliases

arxiv: gr-qc/9506070 · arxiv_version: gr-qc/9506070v2 · doi: 10.48550/arxiv.gr-qc/9506070 · pith_short_12: 56KK7NRCECI3 · pith_short_16: 56KK7NRCECI3K72E · pith_short_8: 56KK7NRC

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/56KK7NRCECI3K72ETGVELXL6JL \
  | 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: ef94afb6222091b57f4499aa45dd7e4afb476384961e59171dd602418b112771

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f7abc8c4c03dd9ba784e619c948f7a90eb193868590fd3fd9705feaa278da37",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1995-06-28T15:43:52Z",
    "title_canon_sha256": "838e009efea1e31ce558706ea79dd2c191f17dcac98a2c2012310d53c4cdb38f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9506070",
    "kind": "arxiv",
    "version": 2
  }
}