Pith Number

pith:53WLJIDD

pith:2009:53WLJIDDSR5LBP5GFPA6OH7MLX

not attested not anchored not stored refs pending

Lorentzian spacetimes with constant curvature invariants in four dimensions

Alan Coley, Nicos Pelavas, Sigbjorn Hervik

arxiv:0904.4877 v1 · 2009-04-30 · 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{53WLJIDDSR5LBP5GFPA6OH7MLX}

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.

Cited by

1 paper in Pith

All symmetry groups of pp-waves in teleparallel gravity

Receipt and verification

First computed	2026-07-04T15:47:29.345931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eeecb4a063947ab0bfa62bc1e71fec5dddd4e097a6b43f6418f265ea5e3a1de2

Aliases

arxiv: 0904.4877 · arxiv_version: 0904.4877v1 · doi: 10.48550/arxiv.0904.4877 · pith_short_12: 53WLJIDDSR5L · pith_short_16: 53WLJIDDSR5LBP5G · pith_short_8: 53WLJIDD

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/53WLJIDDSR5LBP5GFPA6OH7MLX \
  | 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: eeecb4a063947ab0bfa62bc1e71fec5dddd4e097a6b43f6418f265ea5e3a1de2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fc6f7d6bbea8b9d845f59c5635581b6b213e35d3ba2617472bfecd1a402166d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2009-04-30T16:23:57Z",
    "title_canon_sha256": "47573f9e5d5a65e4f66ee0de1634cabe8c17b3f8e0893c0a0bd91bda817da9db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4877",
    "kind": "arxiv",
    "version": 1
  }
}