Pith Number

pith:FRBZIKRV

pith:2007:FRBZIKRVKKTIRAKFLCJYNO4OWW

not attested not anchored not stored refs pending

Dynamical Interactions and the Black Hole Merger Rate of the Universe

(2) Northwestern University), Frederic Rasio (2) ((1) CfA, Richard O'Shaughnessy (2), Ryan O'Leary (1)

arxiv:astro-ph/0701887 v2 · 2007-01-31 · 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{FRBZIKRVKKTIRAKFLCJYNO4OWW}

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	2026-07-04T15:21:53.294531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c43942a3552a6888145589386bb8eb5879807ca95b21f0ef3c483629b652e7c

Aliases

arxiv: astro-ph/0701887 · arxiv_version: astro-ph/0701887v2 · doi: 10.48550/arxiv.astro-ph/0701887 · pith_short_12: FRBZIKRVKKTI · pith_short_16: FRBZIKRVKKTIRAKF · pith_short_8: FRBZIKRV

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/FRBZIKRVKKTIRAKFLCJYNO4OWW \
  | 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: 2c43942a3552a6888145589386bb8eb5879807ca95b21f0ef3c483629b652e7c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "475df2d70a6b492e50db5f44387d5af0bab216898d4d305d5a4029c7efd28bcd",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-01-31T19:01:18Z",
    "title_canon_sha256": "23604c50d2ee0fe89c35b16da7787f19f023913d69c458648c63c1c37a4630fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0701887",
    "kind": "arxiv",
    "version": 2
  }
}