Pith Number

pith:UGLQIIYI

pith:2011:UGLQIIYIADX62PFBEXNGBETVVH

not attested not anchored not stored refs pending

Star Clusters in M 31. IV. A Comparative Analysis of Absorption Line Indices in Old M 31 and Milky Way Clusters

Genevieve J. Graves, Heather Morrison, Lauren A. MacArthur, Nelson Caldwell, Paul Harding, Ricardo P. Schiavon, Stephane Courteau

arxiv:1112.2737 v1 · 2011-12-12 · 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{UGLQIIYIADX62PFBEXNGBETVVH}

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	2026-05-18T01:59:11.274121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a19704230800efed3ca125da609275a9c24e952914620e9fa5b19d7171414103

Aliases

arxiv: 1112.2737 · arxiv_version: 1112.2737v1 · doi: 10.48550/arxiv.1112.2737 · pith_short_12: UGLQIIYIADX6 · pith_short_16: UGLQIIYIADX62PFB · pith_short_8: UGLQIIYI

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/UGLQIIYIADX62PFBEXNGBETVVH \
  | 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: a19704230800efed3ca125da609275a9c24e952914620e9fa5b19d7171414103

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6425fcb443ad438ddaedff7d455adc2158277371ec526f64cad6fb77a587460a",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-12-12T22:28:34Z",
    "title_canon_sha256": "3ebd230038557eeb77f8d0c464f17efe9ac8f5a5173b39afff95a41fc857ecd2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2737",
    "kind": "arxiv",
    "version": 1
  }
}