Pith Number

pith:NPP4KMNS

pith:2016:NPP4KMNSFQAZQB3XOYIEE6RODF

not attested not anchored not stored refs pending

A geometric invariant characterising initial data for the Kerr-Newman spacetime

Juan A. Valiente Kroon, Michael J. Cole

arxiv:1609.05129 v1 · 2016-09-16 · 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{NPP4KMNSFQAZQB3XOYIEE6RODF}

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	2026-05-18T00:20:07.418927Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bdfc531b22c019807777610427a2e197c602549e4971c8b8b2a0f2664d9e2d6

Aliases

arxiv: 1609.05129 · arxiv_version: 1609.05129v1 · doi: 10.48550/arxiv.1609.05129 · pith_short_12: NPP4KMNSFQAZ · pith_short_16: NPP4KMNSFQAZQB3X · pith_short_8: NPP4KMNS

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/NPP4KMNSFQAZQB3XOYIEE6RODF \
  | 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: 6bdfc531b22c019807777610427a2e197c602549e4971c8b8b2a0f2664d9e2d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6be533382e5823f76ae02978b0403b71c96acb84216c62548532c7ab90ac29cb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2016-09-16T16:41:30Z",
    "title_canon_sha256": "828b1612347d5c6c808a71c6deff0939f8fabae63618ae4f9cd6b2e3d4518e8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.05129",
    "kind": "arxiv",
    "version": 1
  }
}