Pith Number

pith:4D5QGAFA

pith:2018:4D5QGAFAVMHZO22LVBYLQVN35T

not attested not anchored not stored refs pending

The self-dual classical double copy, and the Eguchi-Hanson instanton

Andr\'es Luna, Chris D. White, David S. Berman, Erick Chac\'on

arxiv:1809.04063 v2 · 2018-09-11 · hep-th · gr-qc · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4D5QGAFAVMHZO22LVBYLQVN35T}

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

The Penrose Transform and the Kerr-Schild double copy

Receipt and verification

First computed	2026-05-17T23:53:28.771868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0fb0300a0ab0f976b4ba870b855bbecf1eaa025cde4a18dc43f784646e6ef47

Aliases

arxiv: 1809.04063 · arxiv_version: 1809.04063v2 · doi: 10.48550/arxiv.1809.04063 · pith_short_12: 4D5QGAFAVMHZ · pith_short_16: 4D5QGAFAVMHZO22L · pith_short_8: 4D5QGAFA

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/4D5QGAFAVMHZO22LVBYLQVN35T \
  | 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: e0fb0300a0ab0f976b4ba870b855bbecf1eaa025cde4a18dc43f784646e6ef47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6219a13e3a6695e4dddbe217e4220bcab7a98a818c977a7b2bacaf6ed6be3d95",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2018-09-11T17:51:53Z",
    "title_canon_sha256": "cfd4587c4d3bf9776aa3086c13142a91ac0521e6ba1b9ea657e346a84733c734"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.04063",
    "kind": "arxiv",
    "version": 2
  }
}