Pith Number

pith:NQQNOLQM

pith:1998:NQQNOLQMUGF4KJNF4RPCEZU4OP

not attested not anchored not stored refs pending

Head--on Collision of Two Unequal Mass Black Holes

Peter Anninos, Steven Brandt

arxiv:gr-qc/9806031 v1 · 1998-06-06 · gr-qc · astro-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{NQQNOLQMUGF4KJNF4RPCEZU4OP}

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

Quasi-Normal Modes of Stars and Black Holes

Receipt and verification

First computed	2026-07-04T16:08:49.461474Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c20d72e0ca18bc525a5e45e22669c73cab805043682a50db7b860a293cf16c0

Aliases

arxiv: gr-qc/9806031 · arxiv_version: gr-qc/9806031v1 · doi: 10.48550/arxiv.gr-qc/9806031 · pith_short_12: NQQNOLQMUGF4 · pith_short_16: NQQNOLQMUGF4KJNF · pith_short_8: NQQNOLQM

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/NQQNOLQMUGF4KJNF4RPCEZU4OP \
  | 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: 6c20d72e0ca18bc525a5e45e22669c73cab805043682a50db7b860a293cf16c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f2a8bff01bcb5d383b207f82e89bc62e542a393c8dd2c1baa3bbd3918ee9818e",
    "cross_cats_sorted": [
      "astro-ph"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1998-06-06T01:07:10Z",
    "title_canon_sha256": "6307a332bfbfc49d1eee6a38622432d2a72d5f237e07c7166db4bc962062fd26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9806031",
    "kind": "arxiv",
    "version": 1
  }
}