Pith Number

pith:3BULI6LK

pith:2002:3BULI6LKAG67KI4CJFRKXM73M3

not attested not anchored not stored refs pending

Black Hole Demographics

Laura Ferrarese (Rutgers University)

arxiv:astro-ph/0203047 v1 · 2002-03-04 · 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{3BULI6LKAG67KI4CJFRKXM73M3}

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	2026-05-18T00:37:00.864802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d868b4796a01bdf523824962abb3fb66c0419e139eeb1942521d178dabd43199

Aliases

arxiv: astro-ph/0203047 · arxiv_version: astro-ph/0203047v1 · doi: 10.48550/arxiv.astro-ph/0203047 · pith_short_12: 3BULI6LKAG67 · pith_short_16: 3BULI6LKAG67KI4C · pith_short_8: 3BULI6LK

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/3BULI6LKAG67KI4CJFRKXM73M3 \
  | 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: d868b4796a01bdf523824962abb3fb66c0419e139eeb1942521d178dabd43199

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "47291891707da1efe70ecea7e9118faaa5e0c31f0e37896e369292090c689da0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-03-04T21:01:04Z",
    "title_canon_sha256": "bcee70cfa5568f1762e732935ebac21bed0539a36b4c7461f05450fa7b2de104"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0203047",
    "kind": "arxiv",
    "version": 1
  }
}