Pith Number

pith:Y3RMXV6V

pith:2000:Y3RMXV6VBG5A75MEYU3RTJNW23

not attested not anchored not stored refs pending

The H Beta Index as an Age Indicator of Old Stellar Systems: The Effects of Horizontal-Branch Stars

Hyun-chul Lee, Suk-Jin Yoon, Young-Wook Lee

arxiv:astro-ph/0004247 v1 · 2000-04-18 · 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{Y3RMXV6VBG5A75MEYU3RTJNW23}

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	2026-07-04T16:16:19.378930Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6e2cbd7d509ba0ff584c53719a5b6d6ece9bd90ed37ac5fa76e61279fc5eb28

Aliases

arxiv: astro-ph/0004247 · arxiv_version: astro-ph/0004247v1 · doi: 10.48550/arxiv.astro-ph/0004247 · pith_short_12: Y3RMXV6VBG5A · pith_short_16: Y3RMXV6VBG5A75ME · pith_short_8: Y3RMXV6V

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/Y3RMXV6VBG5A75MEYU3RTJNW23 \
  | 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: c6e2cbd7d509ba0ff584c53719a5b6d6ece9bd90ed37ac5fa76e61279fc5eb28

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b87106df786c842daacad3c4e51b18499bdac69a0d91b8b16376a0d0b4aeeaf2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-04-18T12:04:47Z",
    "title_canon_sha256": "bc975a19dcd4ccd7b3a363dc0d12d2dbea54902f7065cf58f8ae8fe649245ba9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0004247",
    "kind": "arxiv",
    "version": 1
  }
}