Pith Number

pith:IQN5MXDR

pith:2025:IQN5MXDRHOYT464L5CF7X3LRVI

not attested not anchored not stored refs pending

Classification of $\Lambda \neq 0$-vacuum algebraically special spacetimes with conformally flat $\mathscr I$ from Weyl tensor expansion

Carlos Pe\'on-Nieto, Marc Mars

arxiv:2507.21292 v1 · 2025-07-28 · gr-qc · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IQN5MXDRHOYT464L5CF7X3LRVI}

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	2026-07-05T11:44:57.059609Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

441bd65c713bb13e7b8be88bfbed71aa2f8cd1e2360e59f0ce0f91154878f114

Aliases

arxiv: 2507.21292 · arxiv_version: 2507.21292v1 · doi: 10.48550/arxiv.2507.21292 · pith_short_12: IQN5MXDRHOYT · pith_short_16: IQN5MXDRHOYT464L · pith_short_8: IQN5MXDR

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/IQN5MXDRHOYT464L5CF7X3LRVI \
  | 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: 441bd65c713bb13e7b8be88bfbed71aa2f8cd1e2360e59f0ce0f91154878f114

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de3555c1bde4c2a9c3d4e02784a504e33206ec3dbcd63f74f6cd823dee975bbb",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2025-07-28T19:26:59Z",
    "title_canon_sha256": "7812d1113a9c5f9c68bcf0e447f4e3b98e671c947f30b7a295fc118432491af3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.21292",
    "kind": "arxiv",
    "version": 1
  }
}