Pith Number

pith:NBKA44XD

pith:2011:NBKA44XDMQVHLBLT4AUNRV4KWT

not attested not anchored not stored refs pending

Spin foam models with finite groups

Benjamin Bahr, Bianca Dittrich, James P. Ryan

arxiv:1103.6264 v1 · 2011-03-31 · gr-qc · hep-th · 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{NBKA44XDMQVHLBLT4AUNRV4KWT}

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	2026-05-18T04:25:13.552859Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68540e72e3642a758573e028d8d78ab4e2961405da1cdfbce2e29b0c1a921ba2

Aliases

arxiv: 1103.6264 · arxiv_version: 1103.6264v1 · doi: 10.48550/arxiv.1103.6264 · pith_short_12: NBKA44XDMQVH · pith_short_16: NBKA44XDMQVHLBLT · pith_short_8: NBKA44XD

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/NBKA44XDMQVHLBLT4AUNRV4KWT \
  | 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: 68540e72e3642a758573e028d8d78ab4e2961405da1cdfbce2e29b0c1a921ba2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6824d2acfa5178d2239e2ca0ddf4724b0b62778374574b277caa943a22ea4107",
    "cross_cats_sorted": [
      "hep-th",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2011-03-31T18:42:12Z",
    "title_canon_sha256": "4bd3676cef2678deeed20a8fd83705c0c00e70275d9e8ff94d2594029945f353"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.6264",
    "kind": "arxiv",
    "version": 1
  }
}