Pith Number

pith:OCRKYFHY

pith:2012:OCRKYFHY3UC6LABZIWGHKTY5VQ

not attested not anchored not stored refs pending

Classical Cepheids Require Enhanced Mass Loss

Ed Guinan, Hilding R. Neilson, Norbert Langer, Robert Izzard, Scott G. Engle

arxiv:1210.6042 v1 · 2012-10-22 · 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{OCRKYFHY3UC6LABZIWGHKTY5VQ}

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	2026-05-18T01:53:44.654709Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70a2ac14f8dd05e58039458c754f1dac372db4f5b952fc27c4f541e972df7a1a

Aliases

arxiv: 1210.6042 · arxiv_version: 1210.6042v1 · doi: 10.48550/arxiv.1210.6042 · pith_short_12: OCRKYFHY3UC6 · pith_short_16: OCRKYFHY3UC6LABZ · pith_short_8: OCRKYFHY

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/OCRKYFHY3UC6LABZIWGHKTY5VQ \
  | 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: 70a2ac14f8dd05e58039458c754f1dac372db4f5b952fc27c4f541e972df7a1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "56b1dc041f84b6265b6bbebe7b6a436931441402bc2bf1eec7be2b11b19f0574",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-10-22T20:00:09Z",
    "title_canon_sha256": "fda6846e8beba307d9bb1de236bb2020afd3669c05190959fc9b110feb630482"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.6042",
    "kind": "arxiv",
    "version": 1
  }
}