Pith Number

pith:3UMV2CTU

pith:2007:3UMV2CTUDJUJ4A6KL3BSFCJAON

not attested not anchored not stored refs pending

The local supermassive black hole mass density: corrections for dependencies on the Hubble constant

Alister W. Graham (Swinburne, Australia), Scotland), Simon P. Driver (St Andrews

arxiv:0705.4505 v1 · 2007-05-31 · 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{3UMV2CTUDJUJ4A6KL3BSFCJAON}

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	2026-05-18T03:57:13.138523Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd195d0a741a689e03ca5ec3228920736a0ccf94ee1a9cfc62010de2c819e683

Aliases

arxiv: 0705.4505 · arxiv_version: 0705.4505v1 · doi: 10.48550/arxiv.0705.4505 · pith_short_12: 3UMV2CTUDJUJ · pith_short_16: 3UMV2CTUDJUJ4A6K · pith_short_8: 3UMV2CTU

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/3UMV2CTUDJUJ4A6KL3BSFCJAON \
  | 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: dd195d0a741a689e03ca5ec3228920736a0ccf94ee1a9cfc62010de2c819e683

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ace142d4b9ef058671c20d85ac3f4a64ae014ae0a2072282ccd2a7b0996ec9f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-05-31T02:56:23Z",
    "title_canon_sha256": "ab66babf06952381fbc6fbea48cf43fa5ba087a2be54fd1b1322fdf75fdef0ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.4505",
    "kind": "arxiv",
    "version": 1
  }
}