Pith Number

pith:Y6U2MSY5

pith:2009:Y6U2MSY5LHWIQ2OS4IFHM5OYNC

not attested not anchored not stored refs pending

Formation of late-type spiral galaxies: gas return from stellar populations regulates disk destruction and bulge growth

Frederic Bournaud (CEA Saclay), Marie Martig

arxiv:0911.0891 v3 · 2009-11-04 · astro-ph.CO · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y6U2MSY5LHWIQ2OS4IFHM5OYNC}

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	2026-05-18T02:10:59.486814Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7a9a64b1d59ec8869d2e20a7675d86881dd4dfeed7128931da591b0e4d4bba0

Aliases

arxiv: 0911.0891 · arxiv_version: 0911.0891v3 · doi: 10.48550/arxiv.0911.0891 · pith_short_12: Y6U2MSY5LHWI · pith_short_16: Y6U2MSY5LHWIQ2OS · pith_short_8: Y6U2MSY5

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/Y6U2MSY5LHWIQ2OS4IFHM5OYNC \
  | 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: c7a9a64b1d59ec8869d2e20a7675d86881dd4dfeed7128931da591b0e4d4bba0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a31e4de0a9f11bcbe40540bd7cfc58dbd311a62a893c8650def20e5191d83cbc",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-04T17:44:33Z",
    "title_canon_sha256": "ca4b9e07a3ec6f44e0f2ef1ce567bebc85d4ee1b43a1e03705fb96ddfc93d3eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.0891",
    "kind": "arxiv",
    "version": 3
  }
}