Pith Number

pith:QQNWJSRR

pith:2012:QQNWJSRR5T7YCVNGQRKHIXEAFE

not attested not anchored not stored refs pending

Divergences in spinfoam quantum gravity

Matteo Smerlak

arxiv:1201.4874 v1 · 2012-01-23 · 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{QQNWJSRR5T7YCVNGQRKHIXEAFE}

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	2026-05-18T04:04:04.908607Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

841b64ca31ecff8155a68454745c802931828af099c88c738c5784f308530f42

Aliases

arxiv: 1201.4874 · arxiv_version: 1201.4874v1 · doi: 10.48550/arxiv.1201.4874 · pith_short_12: QQNWJSRR5T7Y · pith_short_16: QQNWJSRR5T7YCVNG · pith_short_8: QQNWJSRR

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/QQNWJSRR5T7YCVNGQRKHIXEAFE \
  | 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: 841b64ca31ecff8155a68454745c802931828af099c88c738c5784f308530f42

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee8f53050db42d1036443f7774a041538eabea9c3ddd9883d52da1bca6cf984f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2012-01-23T21:24:17Z",
    "title_canon_sha256": "f22fabc26b71411cfaafe6270f9eb891e886dc613d61329b6e928784632d32d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4874",
    "kind": "arxiv",
    "version": 1
  }
}