Pith Number

pith:4NVW3EG7

pith:2005:4NVW3EG7MV3ZT6E6LC6IX2SPVB

not attested not anchored not stored refs pending

Comment on the Origin of the Supermassive Black Hole

Kazuyasu Shigemoto

arxiv:astro-ph/0503608 v1 · 2005-03-29 · 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{4NVW3EG7MV3ZT6E6LC6IX2SPVB}

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	2026-05-18T01:19:35.615475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e36b6d90df657799f89e58bc8bea4fa857c047a9643fa56c328869a55a939243

Aliases

arxiv: astro-ph/0503608 · arxiv_version: astro-ph/0503608v1 · doi: 10.48550/arxiv.astro-ph/0503608 · pith_short_12: 4NVW3EG7MV3Z · pith_short_16: 4NVW3EG7MV3ZT6E6 · pith_short_8: 4NVW3EG7

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/4NVW3EG7MV3ZT6E6LC6IX2SPVB \
  | 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: e36b6d90df657799f89e58bc8bea4fa857c047a9643fa56c328869a55a939243

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0425d4094a8c1deb61a519bc3532f0cc670141969e55eedd7b405c3d175e4f38",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-03-29T05:34:34Z",
    "title_canon_sha256": "7239b807abee06c2771c38722e37216318b6519ece3f26740b9ac387933fc57e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0503608",
    "kind": "arxiv",
    "version": 1
  }
}