Pith Number

pith:XF4M7YUS

pith:2018:XF4M7YUSJ3ZQTVBN3MWFRDJ2AV

not attested not anchored not stored refs pending

Classical Double Copy: Kerr-Schild-Kundt metrics from Yang-Mills Theory

Bayram Tekin, Metin Gurses

arxiv:1810.03411 v3 · 2018-10-08 · 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{XF4M7YUSJ3ZQTVBN3MWFRDJ2AV}

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

Untwisting the double copy: the zeroth copy as an optical seed

Receipt and verification

First computed	2026-07-05T03:11:51.121617Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b978cfe2924ef309d42ddb2c588d3a055995b6b9d421a30e9bea3dbb0485a723

Aliases

arxiv: 1810.03411 · arxiv_version: 1810.03411v3 · doi: 10.48550/arxiv.1810.03411 · pith_short_12: XF4M7YUSJ3ZQ · pith_short_16: XF4M7YUSJ3ZQTVBN · pith_short_8: XF4M7YUS

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/XF4M7YUSJ3ZQTVBN3MWFRDJ2AV \
  | 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: b978cfe2924ef309d42ddb2c588d3a055995b6b9d421a30e9bea3dbb0485a723

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15afdc1814c70e4fe80a6a9a38f3c9fccab8b214f4726c83923b234a319f0d72",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-10-08T12:49:08Z",
    "title_canon_sha256": "34f248839919c6e46f28ecb8aaa467e2d37589427fdb90105ebcac4f01f9cc75"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.03411",
    "kind": "arxiv",
    "version": 3
  }
}