Pith Number

pith:CQPA4K2J

pith:1996:CQPA4K2JBJ35OWKOBMRXF4HGFC

not attested not anchored not stored refs pending

Non-axisymmetric, scale-free, razor-thin discs

Dave Syer (CITA, MPA), Scott Tremaine (CITA)

arxiv:astro-ph/9602106 v1 · 1996-02-21 · 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{CQPA4K2JBJ35OWKOBMRXF4HGFC}

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	2026-05-18T01:40:21.748621Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

141e0e2b490a77d7594e0b2372f0e6289ed238ab271ef57459982e75d9fbf5c6

Aliases

arxiv: astro-ph/9602106 · arxiv_version: astro-ph/9602106v1 · doi: 10.48550/arxiv.astro-ph/9602106 · pith_short_12: CQPA4K2JBJ35 · pith_short_16: CQPA4K2JBJ35OWKO · pith_short_8: CQPA4K2J

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/CQPA4K2JBJ35OWKOBMRXF4HGFC \
  | 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: 141e0e2b490a77d7594e0b2372f0e6289ed238ab271ef57459982e75d9fbf5c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be20c2c0c6b5efcc73dc0fa95e910563cda710b6b82d57195c0dd9328dc73ae0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1996-02-21T16:38:04Z",
    "title_canon_sha256": "b884c698f9b055ebb0f8c569d852d83919dad820997817473b4653761fd9bede"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9602106",
    "kind": "arxiv",
    "version": 1
  }
}