Pith Number

pith:FPK6QOMN

pith:2012:FPK6QOMNZSRUDDT7GE7T45AEYX

not attested not anchored not stored refs pending

Holonomy Spin Foam Models: Boundary Hilbert spaces and Time Evolution Operators

Bianca Dittrich, Frank Hellmann, Wojciech Kaminski

arxiv:1209.4539 v1 · 2012-09-20 · gr-qc · hep-lat

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FPK6QOMNZSRUDDT7GE7T45AEYX}

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	2026-05-18T01:54:20.668145Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bd5e8398dcca3418e7f313f3e7404c5e48ac2b0adb03772af74ed1a2469ee39

Aliases

arxiv: 1209.4539 · arxiv_version: 1209.4539v1 · doi: 10.48550/arxiv.1209.4539 · pith_short_12: FPK6QOMNZSRU · pith_short_16: FPK6QOMNZSRUDDT7 · pith_short_8: FPK6QOMN

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/FPK6QOMNZSRUDDT7GE7T45AEYX \
  | 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: 2bd5e8398dcca3418e7f313f3e7404c5e48ac2b0adb03772af74ed1a2469ee39

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f918e995958430db6bfe9a5a0a27b3b4cca6b528d9a9eea020537e44e20a8fc7",
    "cross_cats_sorted": [
      "hep-lat"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2012-09-20T14:12:10Z",
    "title_canon_sha256": "98d301adbe5608da14c33a5d804185758aec921be2b354e360e756bdd5562332"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4539",
    "kind": "arxiv",
    "version": 1
  }
}