Pith Number

pith:RZGQ2AXZ

pith:2010:RZGQ2AXZ6RZAKAJAGR5IBRPEP7

not attested not anchored not stored refs pending

An intrinsic characterization of 2+2 warped spacetimes

Joan Josep Ferrando, Juan Antonio S\'aez

arxiv:1005.1491 v1 · 2010-05-10 · 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{RZGQ2AXZ6RZAKAJAGR5IBRPEP7}

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	2026-05-18T03:57:39.104745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e4d0d02f9f472050120347a80c5e47ff904b5186df0fd159e58e6665bf1a07e

Aliases

arxiv: 1005.1491 · arxiv_version: 1005.1491v1 · doi: 10.48550/arxiv.1005.1491 · pith_short_12: RZGQ2AXZ6RZA · pith_short_16: RZGQ2AXZ6RZAKAJA · pith_short_8: RZGQ2AXZ

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/RZGQ2AXZ6RZAKAJAGR5IBRPEP7 \
  | 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: 8e4d0d02f9f472050120347a80c5e47ff904b5186df0fd159e58e6665bf1a07e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b66385e3a0830ead1291d5f0e5ab9c378179f44854fb80db7be4d04ff5dd90d1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2010-05-10T11:10:08Z",
    "title_canon_sha256": "fa026fcea3f690f1276671282002141eb987081a051b9eae645bfb7598ecd1d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1005.1491",
    "kind": "arxiv",
    "version": 1
  }
}