Pith Number

pith:ITG3EYUI

pith:2014:ITG3EYUIKQRQWYPETDR5FUDGD3

not attested not anchored not stored refs pending

The Secret Lives of Cepheids: Evolutionary Changes and Pulsation-Induced Shock Heating in the Prototype Classical Cepheid {\delta} Cep

Edward F. Guinan, Graham M. Harper, Hilding R. Neilson, Nancy Remage Evans, Scott G. Engle

arxiv:1409.8628 v1 · 2014-09-30 · 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{ITG3EYUIKQRQWYPETDR5FUDGD3}

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	2026-05-18T02:41:24.060995Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44cdb2628854230b61e498e3d2d0661eff61eacef5d2003c51461aa783232e2a

Aliases

arxiv: 1409.8628 · arxiv_version: 1409.8628v1 · doi: 10.48550/arxiv.1409.8628 · pith_short_12: ITG3EYUIKQRQ · pith_short_16: ITG3EYUIKQRQWYPE · pith_short_8: ITG3EYUI

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/ITG3EYUIKQRQWYPETDR5FUDGD3 \
  | 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: 44cdb2628854230b61e498e3d2d0661eff61eacef5d2003c51461aa783232e2a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1fdd2c7841828b8c1e6a88c9c8fe7587fa8b29f50844fd51d61c6ffd5c95db39",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2014-09-30T16:52:18Z",
    "title_canon_sha256": "8d8382e48816ead4161fbade0f40b7ef67c5e683af0d8bc169b330db7647d5d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.8628",
    "kind": "arxiv",
    "version": 1
  }
}