Pith Number

pith:QXHHWKPW

pith:1993:QXHHWKPWIIQYOF3MZ75LPZ7KXW

not attested not anchored not stored refs pending

The Collision of Two Black Holes

David Hobill, Edward Seidel, Larry Smarr, Peter Anninos, Wai-Mo Suen

arxiv:gr-qc/9309016 v1 · 1993-09-14 · 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{QXHHWKPWIIQYOF3MZ75LPZ7KXW}

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

Quasi-Normal Modes of Stars and Black Holes

Quasinormal modes of black holes and black branes

Receipt and verification

First computed	2026-05-18T01:06:48.165445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85ce7b29f6422187176ccffab7e7eabd8a8ca5002ada5ec37cd8ee9c7d4bf422

Aliases

arxiv: gr-qc/9309016 · arxiv_version: gr-qc/9309016v1 · doi: 10.48550/arxiv.gr-qc/9309016 · pith_short_12: QXHHWKPWIIQY · pith_short_16: QXHHWKPWIIQYOF3M · pith_short_8: QXHHWKPW

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/QXHHWKPWIIQYOF3MZ75LPZ7KXW \
  | 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: 85ce7b29f6422187176ccffab7e7eabd8a8ca5002ada5ec37cd8ee9c7d4bf422

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cdaa4f279017c171efda5b8a6ef2fedfc1e4e043411f856b9fcab0c6cef22a78",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1993-09-14T23:45:41Z",
    "title_canon_sha256": "de39a0374de763425e0f637635abe818732248e3b7f044775004ef2ca8cc4730"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9309016",
    "kind": "arxiv",
    "version": 1
  }
}