Pith Number

pith:4ZMCM4WF

pith:2001:4ZMCM4WF5VCEIJ3RBULRW7XRUB

not attested not anchored not stored refs pending

A Correlation between Galaxy Light Concentration and Supermassive Black Hole Mass

Alister W. Graham, Ignacio Trujillo, Nicola Caon, Peter Erwin

arxiv:astro-ph/0111152 v2 · 2001-11-07 · 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{4ZMCM4WF5VCEIJ3RBULRW7XRUB}

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	2026-07-04T16:24:25.523113Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6582672c5ed444427710d171b7ef1a071bce20881ad31837d6e46218aa18098

Aliases

arxiv: astro-ph/0111152 · arxiv_version: astro-ph/0111152v2 · doi: 10.48550/arxiv.astro-ph/0111152 · pith_short_12: 4ZMCM4WF5VCE · pith_short_16: 4ZMCM4WF5VCEIJ3R · pith_short_8: 4ZMCM4WF

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/4ZMCM4WF5VCEIJ3RBULRW7XRUB \
  | 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: e6582672c5ed444427710d171b7ef1a071bce20881ad31837d6e46218aa18098

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c37b67e1e93bad11b1f3b8d5e475f47601033fd8a68dbb5c1443a5780eda4e37",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-11-07T16:17:37Z",
    "title_canon_sha256": "864cd273f49499285837889f27bf2b36ab46afb285f523851efd6b23e7e7bc91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0111152",
    "kind": "arxiv",
    "version": 2
  }
}