Pith Number

pith:XI2B7FGF

pith:2002:XI2B7FGFA6PLS4ER5RAH7SARMN

not attested not anchored not stored refs pending

Double Bars, Inner Disks, and Nuclear Rings in Early-Type Disk Galaxies

Linda S. Sparke (U. Wisconsin-Madison), Peter Erwin (Instituto de Astrofisica de Canarias)

arxiv:astro-ph/0203514 v1 · 2002-03-29 · 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{XI2B7FGFA6PLS4ER5RAH7SARMN}

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	2026-07-04T15:20:08.563688Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba341f94c5079eb97091ec407fc811636914bb69a3e6a266c1b27d4d755c83a3

Aliases

arxiv: astro-ph/0203514 · arxiv_version: astro-ph/0203514v1 · doi: 10.48550/arxiv.astro-ph/0203514 · pith_short_12: XI2B7FGFA6PL · pith_short_16: XI2B7FGFA6PLS4ER · pith_short_8: XI2B7FGF

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/XI2B7FGFA6PLS4ER5RAH7SARMN \
  | 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: ba341f94c5079eb97091ec407fc811636914bb69a3e6a266c1b27d4d755c83a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f04bbb4d5770701bc59d3784c2d266b2d39f9204d28348f68be7b8794fe9a97",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-03-29T02:01:49Z",
    "title_canon_sha256": "ae94c0a85002fd722c98df529730d385dcc4e4fbb51b37943bd13613d1d9ae07"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0203514",
    "kind": "arxiv",
    "version": 1
  }
}