Pith Number

pith:H3W7CHZA

pith:2018:H3W7CHZA4TGFXOGCXA3QPYWFWW

not attested not anchored not stored refs pending

Spinor-helicity and the algebraic classification of higher-dimensional spacetimes

Donal O'Connell, Isobel Nicholson, Ricardo Monteiro

arxiv:1809.03906 v2 · 2018-09-11 · 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{H3W7CHZA4TGFXOGCXA3QPYWFWW}

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	2026-05-17T23:49:52.551810Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3eedf11f20e4cc5bb8c2b83707e2c5b592cf7301290e6ff1a68a8f6629acbb1f

Aliases

arxiv: 1809.03906 · arxiv_version: 1809.03906v2 · doi: 10.48550/arxiv.1809.03906 · pith_short_12: H3W7CHZA4TGF · pith_short_16: H3W7CHZA4TGFXOGC · pith_short_8: H3W7CHZA

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/H3W7CHZA4TGFXOGCXA3QPYWFWW \
  | 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: 3eedf11f20e4cc5bb8c2b83707e2c5b592cf7301290e6ff1a68a8f6629acbb1f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5a95414fa079b8dc0fd2c7b91554951ef909e3cb7599121af3f3f5e51ffdb57",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-09-11T14:02:44Z",
    "title_canon_sha256": "1760559b372c291254c23f366f15569cfe2cec87d91ba1fa30072bc9c2f77849"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.03906",
    "kind": "arxiv",
    "version": 2
  }
}