Pith Number

pith:FKWUFXR7

pith:2004:FKWUFXR7K6EGPMSEFDYLB2EV4P

not attested not anchored not stored refs pending

The influence of chemical composition on the properties of Cepheid stars I - Period-Luminosity relation vs iron abundance

F. Primas, G. Bono, M. Groenewegen, M. Mottini, M. Romaniello, P. Francois

arxiv:astro-ph/0411594 v2 · 2004-11-22 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FKWUFXR7K6EGPMSEFDYLB2EV4P}

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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

✓ 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	2026-07-04T16:45:16.536750Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2aad42de3f578867b24428f0b0e895e3d8ee0a970839b2f56fe8ad3cab00c8a6

Aliases

arxiv: astro-ph/0411594 · arxiv_version: astro-ph/0411594v2 · doi: 10.48550/arxiv.astro-ph/0411594 · pith_short_12: FKWUFXR7K6EG · pith_short_16: FKWUFXR7K6EGPMSE · pith_short_8: FKWUFXR7

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/FKWUFXR7K6EGPMSEFDYLB2EV4P \
  | 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: 2aad42de3f578867b24428f0b0e895e3d8ee0a970839b2f56fe8ad3cab00c8a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a921c649a5329c1edd0253a76da474b80dbce9a2e5aff1ad4351ffc79934023a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-11-22T09:06:30Z",
    "title_canon_sha256": "505b1de300045ff10bccd3f6673879d97e6138972c3b7693c0dad06753e07abc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0411594",
    "kind": "arxiv",
    "version": 2
  }
}