Pith Number

pith:JBS4KVRY

pith:2008:JBS4KVRYLIBWPDZMAFSJOWTHGA

not attested not anchored not stored refs pending

Rapidly spinning massive black holes in active galactic nuclei: evidence from the black hole mass function

Fan Li, Xinwu Cao

arxiv:0808.0759 v2 · 2008-08-06 · 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{JBS4KVRYLIBWPDZMAFSJOWTHGA}

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	2026-07-04T17:12:15.355723Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4865c556385a03678f2c0164975a673009e535078d5b94fbdb5586a97aaf231d

Aliases

arxiv: 0808.0759 · arxiv_version: 0808.0759v2 · doi: 10.48550/arxiv.0808.0759 · pith_short_12: JBS4KVRYLIBW · pith_short_16: JBS4KVRYLIBWPDZM · pith_short_8: JBS4KVRY

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/JBS4KVRYLIBWPDZMAFSJOWTHGA \
  | 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: 4865c556385a03678f2c0164975a673009e535078d5b94fbdb5586a97aaf231d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc0998c18bded76fb1307ffdfaf0fc634faaaf03e5c4961549c32d7f2849e785",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-08-06T01:51:49Z",
    "title_canon_sha256": "a63ec8d9d4ec391617948bd493e653f10ef96c78292643e0777ba9a3bf580852"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0808.0759",
    "kind": "arxiv",
    "version": 2
  }
}