Pith Number

pith:P4W3K3ZA

pith:2013:P4W3K3ZAO2FN6R54GN6ZPXARZ5

not attested not anchored not stored refs pending

Spatially resolved star formation histories of nearby galaxies: evidence for episodic star formation in discs

Guinevere Kauffmann, Jonas Johansson, Mei-Ling Huang, Romeel Dav\'e, Sean M. Moran, Timothy M. Heckman, Yan-Mei Chen

arxiv:1301.5640 v2 · 2013-01-23 · 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{P4W3K3ZAO2FN6R54GN6ZPXARZ5}

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	2026-05-18T03:21:10.328409Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f2db56f20768adf47bc337d97dc11cf461e779513876d29f4aeef9a0a102e2b

Aliases

arxiv: 1301.5640 · arxiv_version: 1301.5640v2 · doi: 10.48550/arxiv.1301.5640 · pith_short_12: P4W3K3ZAO2FN · pith_short_16: P4W3K3ZAO2FN6R54 · pith_short_8: P4W3K3ZA

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/P4W3K3ZAO2FN6R54GN6ZPXARZ5 \
  | 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: 7f2db56f20768adf47bc337d97dc11cf461e779513876d29f4aeef9a0a102e2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "64602e496dea385c590dd3b4643351a60d8304069079f05ca932ae85502b5e78",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-01-23T21:00:04Z",
    "title_canon_sha256": "283ff58c791a101d4d2505217b6fff252b1edc1d6f9b5fb72366aa7c42d68011"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.5640",
    "kind": "arxiv",
    "version": 2
  }
}