Pith Number

pith:VQILGOPH

pith:2016:VQILGOPHAPUBTTWVESCMLK3KQ7

not attested not anchored not stored refs pending

The Secret Lives of Cepheids: Evolution, Mass Loss, and Ultraviolet Emission of the Long-Period Classical Cepheid $l$ Carinae

Alexandra C. Bisol, Edward F. Guinan, Hilding R. Neilson, Neil Butterworth, Scott G. Engle

arxiv:1604.03128 v1 · 2016-04-11 · 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{VQILGOPHAPUBTTWVESCMLK3KQ7}

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	2026-05-18T01:12:29.546871Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac10b339e703e819ced52484c5ab6a87dbedb25e23b21fc8430c850cd21c240b

Aliases

arxiv: 1604.03128 · arxiv_version: 1604.03128v1 · doi: 10.48550/arxiv.1604.03128 · pith_short_12: VQILGOPHAPUB · pith_short_16: VQILGOPHAPUBTTWV · pith_short_8: VQILGOPH

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/VQILGOPHAPUBTTWVESCMLK3KQ7 \
  | 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: ac10b339e703e819ced52484c5ab6a87dbedb25e23b21fc8430c850cd21c240b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89655d2d90a3c5b52dde79b579aa995f72c1e6daf521e8f8615b5088530f959c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-04-11T20:04:39Z",
    "title_canon_sha256": "ead4521b310c363ee3fdc014f68b33121d7fa7a1fdd68e5c910dd8f92801cc78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.03128",
    "kind": "arxiv",
    "version": 1
  }
}