Pith Number

pith:VSJ65JBL

pith:1999:VSJ65JBLORQ3QJHQGATK2BFQXT

not attested not anchored not stored refs pending

The evolution of black-hole mass and angular momentum

A.R. King, U. Kolb (Leicester)

arxiv:astro-ph/9901296 v1 · 1999-01-21 · 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{VSJ65JBLORQ3QJHQGATK2BFQXT}

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	2026-07-04T16:10:38.394091Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac93eea42b7461b824f03026ad04b0bccea1e910e07dd6010f5166cd53f46020

Aliases

arxiv: astro-ph/9901296 · arxiv_version: astro-ph/9901296v1 · doi: 10.48550/arxiv.astro-ph/9901296 · pith_short_12: VSJ65JBLORQ3 · pith_short_16: VSJ65JBLORQ3QJHQ · pith_short_8: VSJ65JBL

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/VSJ65JBLORQ3QJHQGATK2BFQXT \
  | 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: ac93eea42b7461b824f03026ad04b0bccea1e910e07dd6010f5166cd53f46020

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bcce447499a734c61f5579ce0b02782addc441b6bddf802e2b299860ee9382e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-01-21T15:12:37Z",
    "title_canon_sha256": "4c5050eee3c7ac66001a811a4904c6f7443dbe2b8e1da8dcfd8d91172cc7c678"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9901296",
    "kind": "arxiv",
    "version": 1
  }
}