Pith Number

pith:7WZR3UWS

pith:2000:7WZR3UWS6P5LYXARNIPRJFET5J

not attested not anchored not stored refs pending

Colliding black holes from a null point of view: the close limit

Jeffrey Winicour, Manuela Campanelli, Roberto Gomez, Sascha Husa, Yosef Zlochower

arxiv:gr-qc/0012110 v1 · 2000-12-29 · 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{7WZR3UWS6P5LYXARNIPRJFET5J}

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	2026-07-04T14:25:20.653930Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdb31dd2d2f3fabc5c116a1f149493ea718b77928f4e15b8a5311907efd48f98

Aliases

arxiv: gr-qc/0012110 · arxiv_version: gr-qc/0012110v1 · doi: 10.48550/arxiv.gr-qc/0012110 · pith_short_12: 7WZR3UWS6P5L · pith_short_16: 7WZR3UWS6P5LYXAR · pith_short_8: 7WZR3UWS

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/7WZR3UWS6P5LYXARNIPRJFET5J \
  | 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: fdb31dd2d2f3fabc5c116a1f149493ea718b77928f4e15b8a5311907efd48f98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a6f55dc84d190ca5523ef90bc0f90ca1d17359b3770abfb5fd312a0c97767659",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2000-12-29T17:23:47Z",
    "title_canon_sha256": "90ba464169602a462d9f01c320c628a6de7a06c1e9b48bb095c45cf06ce7101e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0012110",
    "kind": "arxiv",
    "version": 1
  }
}