Pith Number

pith:F7IOEL2Q

pith:2000:F7IOEL2Q6UKQMNDXGMUGI45ZHE

not attested not anchored not stored refs pending

The detection of spiral arm modulation in the mass distribution of an optically flocculent galaxy

Bruce G. Elmegreen (3), David L. Block (2), Ivanio Puerari (1), Jay A. Frogel (4), Paul B. Eskridge (4) ((1) INAOE - Mexico; (2) University of Witwatersrand - South Africa; (3) IBM Research Division, The Ohio State University, T.J. Watson Research Centre, USA), USA; (4) Dept of Astronomy

arxiv:astro-ph/0010532 v1 · 2000-10-26 · 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{F7IOEL2Q6UKQMNDXGMUGI45ZHE}

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	2026-07-04T14:10:49.844673Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fd0e22f50f51506347733286473b93918e2654327c501f7aca4ef5bed37c9e3

Aliases

arxiv: astro-ph/0010532 · arxiv_version: astro-ph/0010532v1 · doi: 10.48550/arxiv.astro-ph/0010532 · pith_short_12: F7IOEL2Q6UKQ · pith_short_16: F7IOEL2Q6UKQMNDX · pith_short_8: F7IOEL2Q

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/F7IOEL2Q6UKQMNDXGMUGI45ZHE \
  | 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: 2fd0e22f50f51506347733286473b93918e2654327c501f7aca4ef5bed37c9e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8d069b9e4e7055818e8f4a661fe15d30fdc6ddf96952dfe624d8160c734e2e0b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-10-26T00:27:59Z",
    "title_canon_sha256": "7d75c7fd8a9b75b976d9a46ec7c3a5a6b666e35d367c4218270d8b395103ae73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0010532",
    "kind": "arxiv",
    "version": 1
  }
}