Pith Number

pith:NQBZ2ZKZ

pith:2009:NQBZ2ZKZLEREAIODGHRFSGJZWR

not attested not anchored not stored refs pending

Hamiltonian formulation of tetrad gravity: three dimensional case

A.M. Frolov, N. Kiriushcheva, S.V. Kuzmin

arxiv:0902.0856 v2 · 2009-02-05 · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NQBZ2ZKZLEREAIODGHRFSGJZWR}

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	2026-05-18T02:35:01.363936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c039d655959224021c331e2591939b46230037e529f3d393f90190e76be26b3

Aliases

arxiv: 0902.0856 · arxiv_version: 0902.0856v2 · doi: 10.48550/arxiv.0902.0856 · pith_short_12: NQBZ2ZKZLERE · pith_short_16: NQBZ2ZKZLEREAIOD · pith_short_8: NQBZ2ZKZ

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/NQBZ2ZKZLEREAIODGHRFSGJZWR \
  | 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: 6c039d655959224021c331e2591939b46230037e529f3d393f90190e76be26b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "213720da9cbcc62bb6d2e39f410be19ba7d4dad5f8cea39dad00eeccdd68494c",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-02-05T07:27:00Z",
    "title_canon_sha256": "5e23fb746024e6fdfe931e20fd682b3a329daebf5c3ff99a8cf7c6af0fb59bef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.0856",
    "kind": "arxiv",
    "version": 2
  }
}