Pith Number

pith:3UBRYO62

pith:2009:3UBRYO62TDEZ5VK3JHT3M4YZVZ

not attested not anchored not stored refs pending

How was the Hubble sequence 6 Gyrs ago?

2), (2) Technological University of Panama, 3), (3) National Astronomical Observatories, Chinese Academy of Sciences), CNRS, F. Hammer (1), H. Flores (1), M. Puech (1), M. Rodrigues (1) ((1) GEPI, Paris Observatory, R. Delgado-Serrano (1, University of Paris-Diderot, Y. B. Yang (1

arxiv:0906.2805 v3 · 2009-06-15 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3UBRYO62TDEZ5VK3JHT3M4YZVZ}

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	2026-05-18T02:13:19.879997Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dd031c3bda98c99ed55b49e7b67319ae7c3df3476ef03026cbbf40f3f393e658

Aliases

arxiv: 0906.2805 · arxiv_version: 0906.2805v3 · doi: 10.48550/arxiv.0906.2805 · pith_short_12: 3UBRYO62TDEZ · pith_short_16: 3UBRYO62TDEZ5VK3 · pith_short_8: 3UBRYO62

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/3UBRYO62TDEZ5VK3JHT3M4YZVZ \
  | 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: dd031c3bda98c99ed55b49e7b67319ae7c3df3476ef03026cbbf40f3f393e658

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c58c7c9d99ee8cefefdc8aea2fa47bffe8daf1698663213a98403fc23a552bf8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-06-15T21:06:55Z",
    "title_canon_sha256": "246e798fd94f2433b39c81b2da62592d343d53ac8f76c781363e084367dfc565"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.2805",
    "kind": "arxiv",
    "version": 3
  }
}