Pith Number

pith:4SCVEU45

pith:2012:4SCVEU45T23G7VRBEVSHM62F7P

not attested not anchored not stored refs pending

Automated unsupervised classification of the Sloan Digital Sky Survey stellar spectra using k-means clustering

2), 2) ((1) Instituto de Astrofisica de Canarias, (2) Departamento de Astrofisica, C. Allende Prieto (1, J. Sanchez Almeida (1, La Laguna, Spain, Spain), Tenerife, Universidad de La Laguna

arxiv:1211.5321 v1 · 2012-11-22 · astro-ph.SR · astro-ph.GA

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

Receipt and verification

First computed	2026-05-18T01:53:01.476871Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e48552539d9eb66fd6212564767b45fbd47051dbe7dc92c2b5edc2bc095eb9ab

Aliases

arxiv: 1211.5321 · arxiv_version: 1211.5321v1 · doi: 10.48550/arxiv.1211.5321

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4SCVEU45T23G7VRBEVSHM62F7P \
  | 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: e48552539d9eb66fd6212564767b45fbd47051dbe7dc92c2b5edc2bc095eb9ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b290d6d883406193b9039ef39a4501796e84d5a84ebbdc417738b2c29e0ee545",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-11-22T16:01:37Z",
    "title_canon_sha256": "20e4969e78b7a44ec88d17ca65cd9fe24f59327525f16bf622e58fdd330bbf33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.5321",
    "kind": "arxiv",
    "version": 1
  }
}