Pith Number

pith:FQKPWCKG

pith:2013:FQKPWCKGDQK55C7XKKFBLKD7DN

not attested not anchored not stored refs pending

Clustering large number of extragalactic spectra of galaxies and quasars through canopies

Asis Kumar Chattopadhyay, Didier Fraix-Burnet (IPAG), Tuli De

arxiv:1309.3729 v1 · 2013-09-15 · astro-ph.CO · astro-ph.IM · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FQKPWCKGDQK55C7XKKFBLKD7DN}

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	2026-05-18T03:13:20.688567Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c14fb09461c15de8bf7528a15a87f1b6176c2f22e3ebd44a506d5685a656621

Aliases

arxiv: 1309.3729 · arxiv_version: 1309.3729v1 · doi: 10.48550/arxiv.1309.3729 · pith_short_12: FQKPWCKGDQK5 · pith_short_16: FQKPWCKGDQK55C7X · pith_short_8: FQKPWCKG

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/FQKPWCKGDQK55C7XKKFBLKD7DN \
  | 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: 2c14fb09461c15de8bf7528a15a87f1b6176c2f22e3ebd44a506d5685a656621

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92188cc57605cb12125f11ad80deca557ee432dbd4a2a978f0862356759d85cf",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-09-15T05:51:37Z",
    "title_canon_sha256": "eae42ba8a180a8bd6c3a5babc35cd71a073371dc971784b63eb5eb8bdcf9911f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.3729",
    "kind": "arxiv",
    "version": 1
  }
}