Pith Number

pith:GEXOEG3N

pith:2008:GEXOEG3NRWBA3KGSCPJNB5RD3I

not attested not anchored not stored refs pending

Formation and evolution of disk galaxies

Joseph Silk

arxiv:0809.0513 v1 · 2008-09-02 · 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{GEXOEG3NRWBA3KGSCPJNB5RD3I}

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	2026-05-18T02:15:35.637303Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

312ee21b6d8d820da8d213d2d0f623da229ac95cca151981880b343c3a07976d

Aliases

arxiv: 0809.0513 · arxiv_version: 0809.0513v1 · doi: 10.48550/arxiv.0809.0513 · pith_short_12: GEXOEG3NRWBA · pith_short_16: GEXOEG3NRWBA3KGS · pith_short_8: GEXOEG3N

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/GEXOEG3NRWBA3KGSCPJNB5RD3I \
  | 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: 312ee21b6d8d820da8d213d2d0f623da229ac95cca151981880b343c3a07976d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5d3f4660618e1a4ec220349d29d037ffe7145f3cb3454e40855056680a18ada",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-02T20:12:46Z",
    "title_canon_sha256": "d7ea20e58a2b628f75030e49ac633ed5f7171525013be978c73c236259515dd5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.0513",
    "kind": "arxiv",
    "version": 1
  }
}