Pith Number

pith:NV4B3RAG

pith:2009:NV4B3RAGGC6JLBUIADRF3UEU7J

not attested not anchored not stored refs pending

Darboux coordinates for the Hamiltonian of first order Einstein-Cartan gravity

N. Kiriushcheva, S.V. Kuzmin

arxiv:0912.5490 v2 · 2009-12-30 · 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{NV4B3RAGGC6JLBUIADRF3UEU7J}

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	2026-05-18T02:33:50.459776Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d781dc40630bc95868800e25dd094fa6b81757d190b1bac160efdeb2157a318

Aliases

arxiv: 0912.5490 · arxiv_version: 0912.5490v2 · doi: 10.48550/arxiv.0912.5490 · pith_short_12: NV4B3RAGGC6J · pith_short_16: NV4B3RAGGC6JLBUI · pith_short_8: NV4B3RAG

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/NV4B3RAGGC6JLBUIADRF3UEU7J \
  | 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: 6d781dc40630bc95868800e25dd094fa6b81757d190b1bac160efdeb2157a318

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24ec954a71aa50dbd4d9411bfa5a69ddfacaa8b7846e67b45b2d4d12befd4f00",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-12-30T17:25:30Z",
    "title_canon_sha256": "db9e681328ef0a933543fc520ba1bfa8e71d9f20d4f383b36dfcd5f4015735fb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.5490",
    "kind": "arxiv",
    "version": 2
  }
}