Pith Number

pith:DBFOFXD7

pith:2000:DBFOFXD7FZ4TRYN4CDP3RFC6L5

not attested not anchored not stored refs pending

HI gas disks in elliptical galaxies

(2) ASTRON, Dwingeloo (NL)), E.M. Sadler (1), R. Morganti (2) ((1) University of Sydney, T. Oosterloo (2)

arxiv:astro-ph/0011399 v1 · 2000-11-22 · 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{DBFOFXD7FZ4TRYN4CDP3RFC6L5}

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	2026-07-04T14:10:53.444901Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

184ae2dc7f2e7938e1bc10dfb8945e5f69718828ff4c6fcd70e44f8121392c6e

Aliases

arxiv: astro-ph/0011399 · arxiv_version: astro-ph/0011399v1 · doi: 10.48550/arxiv.astro-ph/0011399 · pith_short_12: DBFOFXD7FZ4T · pith_short_16: DBFOFXD7FZ4TRYN4 · pith_short_8: DBFOFXD7

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/DBFOFXD7FZ4TRYN4CDP3RFC6L5 \
  | 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: 184ae2dc7f2e7938e1bc10dfb8945e5f69718828ff4c6fcd70e44f8121392c6e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3bc8b3ceec638a8f8de1623d03e91812b4a50edf4d7c525e4ff15afcd36e9dff",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-11-22T09:22:05Z",
    "title_canon_sha256": "de86a9d195f0e0a8b3e3205e3d040644511b77f5bcc8c7c9a9325be1d6b9807d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0011399",
    "kind": "arxiv",
    "version": 1
  }
}