Pith Number

pith:F6H4XDUZ

pith:2017:F6H4XDUZXXTMEV2QSGLZC3FIZL

not attested not anchored not stored refs pending

On the impact of Helium abundance on the Cepheid Period-Luminosity and Wesenheit relations and the Distance Ladder

E. Brocato, G. Raimondo, M. Marconi, R. Carini

arxiv:1704.08875 v1 · 2017-04-28 · 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{F6H4XDUZXXTMEV2QSGLZC3FIZL}

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	2026-05-18T00:40:03.858014Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f8fcb8e99bde6c257509197916ca8caeff388625596322eebcacaf72931fce9

Aliases

arxiv: 1704.08875 · arxiv_version: 1704.08875v1 · doi: 10.48550/arxiv.1704.08875 · pith_short_12: F6H4XDUZXXTM · pith_short_16: F6H4XDUZXXTMEV2Q · pith_short_8: F6H4XDUZ

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/F6H4XDUZXXTMEV2QSGLZC3FIZL \
  | 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: 2f8fcb8e99bde6c257509197916ca8caeff388625596322eebcacaf72931fce9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c087f2273c3b20866371aff2e90e5ce40ad63600de39d390f9ddf4838e4422ed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-04-28T11:17:14Z",
    "title_canon_sha256": "a51c4e5e65174b765688c102a036acf84faba1871a171db968ed74b1871909fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.08875",
    "kind": "arxiv",
    "version": 1
  }
}