Pith Number

pith:7OPAU3NL

pith:2009:7OPAU3NL6UAVPLSVVN2DTVMTON

not attested not anchored not stored refs pending

Clustered star formation as a natural explanation of the Halpha cutoff in disc galaxies

Bonn), Jan Pflamm-Altenburg, Pavel Kroupa (AIfA

arxiv:0905.0898 v1 · 2009-05-06 · 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{7OPAU3NL6UAVPLSVVN2DTVMTON}

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	2026-05-18T04:14:36.159842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb9e0a6dabf50157ae55ab7439d5937347869a4dcc82862847867c69e20f1972

Aliases

arxiv: 0905.0898 · arxiv_version: 0905.0898v1 · doi: 10.48550/arxiv.0905.0898 · pith_short_12: 7OPAU3NL6UAV · pith_short_16: 7OPAU3NL6UAVPLSV · pith_short_8: 7OPAU3NL

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/7OPAU3NL6UAVPLSVVN2DTVMTON \
  | 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: fb9e0a6dabf50157ae55ab7439d5937347869a4dcc82862847867c69e20f1972

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab4dfec028545f6e8f1360656e7ba81cae2727dac4fc494ed906ed991fcc33f4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-05-06T20:00:02Z",
    "title_canon_sha256": "b6235954932cef84f3fe9ba87d83dc5946cb786a9c857733038d4be7d5011ea4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.0898",
    "kind": "arxiv",
    "version": 1
  }
}