Pith Number

pith:QCAZDEN6

pith:2009:QCAZDEN6PMNGT6WBAEE55DD6GV

not attested not anchored not stored refs pending

Testing spectral models for stellar populations with star clusters: I. Methodology

Brazil (2) IAA (CSIC), Roberto Cid Fernandes (1), Rosa M. Gonzalez Delgado (2) ((1) Univ. Santa Catarina, Spain)

arxiv:0912.0410 v1 · 2009-12-02 · 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{QCAZDEN6PMNGT6WBAEE55DD6GV}

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	2026-05-18T02:10:34.617313Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80819191be7b1a69fac10109de8c7e35796d0e7e37bcd75814c099e04de3fdd3

Aliases

arxiv: 0912.0410 · arxiv_version: 0912.0410v1 · doi: 10.48550/arxiv.0912.0410 · pith_short_12: QCAZDEN6PMNG · pith_short_16: QCAZDEN6PMNGT6WB · pith_short_8: QCAZDEN6

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/QCAZDEN6PMNGT6WBAEE55DD6GV \
  | 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: 80819191be7b1a69fac10109de8c7e35796d0e7e37bcd75814c099e04de3fdd3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3ead003f297b0747ce9ff9350727570202b93a72bbf9a80e1047f80d3895049d",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-02T12:38:29Z",
    "title_canon_sha256": "57fa24387704c0d65c03f4e5dc1afcc40e1361ae63150d76f0fc06609a963ca7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0410",
    "kind": "arxiv",
    "version": 1
  }
}