Pith Number

pith:IFP2ZYD4

pith:2012:IFP2ZYD4OZ7WUDDPKCEEBE5TJC

not attested not anchored not stored refs pending

Puzzling Frequencies in First Overtone Cepheids

Copernicus Astronomical Center, Poland), W. A. Dziembowski (Warsaw University Observatory, Warsaw

arxiv:1212.0993 v1 · 2012-12-05 · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IFP2ZYD4OZ7WUDDPKCEEBE5TJC}

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	2026-05-18T03:39:06.746993Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

415face07c767f6a0c6f50884093b348812c35f58033e8279a7b4afe46ae287b

Aliases

arxiv: 1212.0993 · arxiv_version: 1212.0993v1 · doi: 10.48550/arxiv.1212.0993 · pith_short_12: IFP2ZYD4OZ7W · pith_short_16: IFP2ZYD4OZ7WUDDP · pith_short_8: IFP2ZYD4

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/IFP2ZYD4OZ7WUDDPKCEEBE5TJC \
  | 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: 415face07c767f6a0c6f50884093b348812c35f58033e8279a7b4afe46ae287b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20398cad75a5096bca31c92365121d14c050d0dda9db6ccd7b9a3dd41639772b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-12-05T11:27:23Z",
    "title_canon_sha256": "fab19dbdfccc4ee0d0a1df854348df028cf8349a9f56412124297a5c0d692aa6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.0993",
    "kind": "arxiv",
    "version": 1
  }
}