Pith Number

pith:YIF7OEHI

pith:2023:YIF7OEHIEIK6V7JQQAF5FTCU3H

not attested not anchored not stored refs pending

Kerr-Schild double copy for Kundt spacetimes of any dimension

Alena Pravdova, Marcello Ortaggio, Vojtech Pravda

arxiv:2312.00706 v2 · 2023-12-01 · 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{YIF7OEHIEIK6V7JQQAF5FTCU3H}

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

2 papers in Pith

The Penrose Transform and the Kerr-Schild double copy

Black Hole Interiors as a Laboratory for Time-Dependent Classical Double Copy

Receipt and verification

First computed	2026-07-05T07:44:58.430320Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c20bf710e82215eafd30800bd2cc54d9dd98eece34006f5c64ec8766f9cd0e40

Aliases

arxiv: 2312.00706 · arxiv_version: 2312.00706v2 · doi: 10.48550/arxiv.2312.00706 · pith_short_12: YIF7OEHIEIK6 · pith_short_16: YIF7OEHIEIK6V7JQ · pith_short_8: YIF7OEHI

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/YIF7OEHIEIK6V7JQQAF5FTCU3H \
  | 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: c20bf710e82215eafd30800bd2cc54d9dd98eece34006f5c64ec8766f9cd0e40

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd576a59f30511d8a2f8d7f307b20cf58d683cbe4faa41d9eca8cba06a26e353",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2023-12-01T16:42:01Z",
    "title_canon_sha256": "8248cb2215e5d8e7106a77d8f249ecc30fc1ec16f8e11aee45f6100fc0e3e264"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2312.00706",
    "kind": "arxiv",
    "version": 2
  }
}