Pith Number

pith:J4VXPOE5

pith:2018:J4VXPOE5BNKMT6YMS5VPI7FTWW

not attested not anchored not stored refs pending

Mapping EK Draconis with PEPSI - Possible evidence for starspot penumbrae

I. Ilyin, K. G. Strassmeier, M. Weber, S. P. J\"arvinen, T. A. Carroll

arxiv:1812.03675 v1 · 2018-12-10 · 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{J4VXPOE5BNKMT6YMS5VPI7FTWW}

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	2026-05-17T23:58:44.175811Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f2b77b89d0b54c9fb0c976af47cb3b5991e4f5c11fb6b569ecafd760d56c798

Aliases

arxiv: 1812.03675 · arxiv_version: 1812.03675v1 · doi: 10.48550/arxiv.1812.03675 · pith_short_12: J4VXPOE5BNKM · pith_short_16: J4VXPOE5BNKMT6YM · pith_short_8: J4VXPOE5

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/J4VXPOE5BNKMT6YMS5VPI7FTWW \
  | 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: 4f2b77b89d0b54c9fb0c976af47cb3b5991e4f5c11fb6b569ecafd760d56c798

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55f0dc3d9d4e33082ecdc69d01aa4223f258387e7d1e320cf6b6f649198220e0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-12-10T08:52:00Z",
    "title_canon_sha256": "5738110e77661b6de3bb1e38dcf3b011ff4411080b9d7da9c0acc6acab59d9cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.03675",
    "kind": "arxiv",
    "version": 1
  }
}