Pith Number

pith:QJ2I2B4W

pith:2009:QJ2I2B4WW3V5JNJSNQKVRSF36W

not attested not anchored not stored refs pending

Galaxy Zoo: the fraction of merging galaxies in the SDSS and their morphologies

A. Slosar, A. S. Szalay, C. J. Lintott, D. Andreescu, D. Thomas, D. W. Darg, J. Silk, J. Vandenberg, K. Schawinski, M. J. Raddick, M. Sarzi, P. Murray, R. C. Nichol, R. Proctor, S. Bamford, S. Kaviraj

arxiv:0903.4937 v2 · 2009-03-28 · 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{QJ2I2B4WW3V5JNJSNQKVRSF36W}

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	2026-05-18T02:14:18.890164Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82748d0796b6ebd4b5326c1558c8bbf5a34461b5cda5f8527a134459c8188222

Aliases

arxiv: 0903.4937 · arxiv_version: 0903.4937v2 · doi: 10.48550/arxiv.0903.4937 · pith_short_12: QJ2I2B4WW3V5 · pith_short_16: QJ2I2B4WW3V5JNJS · pith_short_8: QJ2I2B4W

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/QJ2I2B4WW3V5JNJSNQKVRSF36W \
  | 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: 82748d0796b6ebd4b5326c1558c8bbf5a34461b5cda5f8527a134459c8188222

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0d3906f789709fe107382774c20576c7526a751de83d52710e370ae3b7988496",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-03-28T04:20:41Z",
    "title_canon_sha256": "22f7cd5e75fc8f5c1e39b18cb2752a7e84d058a933b93c8f242443dbc82ebce2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4937",
    "kind": "arxiv",
    "version": 2
  }
}