Pith Number

pith:YHHDOQWV

pith:2017:YHHDOQWVQ2OO6VA2GQK4NJOWDY

not attested not anchored not stored refs pending

Estimating activity cycles with probabilistic methods II. The Mount Wilson Ca H&K data

A. Grigorievskiy, J. Lehtinen, J. Pelt, M. J. K\"apyl\"a, N. Olspert

arxiv:1712.08240 v4 · 2017-12-21 · astro-ph.SR · stat.AP · stat.ML

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YHHDOQWVQ2OO6VA2GQK4NJOWDY}

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	2026-05-18T00:01:30.294730Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c1ce3742d5869cef541a3415c6a5d61e0659e3f184376dfb8d6ff9adb5728fe7

Aliases

arxiv: 1712.08240 · arxiv_version: 1712.08240v4 · doi: 10.48550/arxiv.1712.08240 · pith_short_12: YHHDOQWVQ2OO · pith_short_16: YHHDOQWVQ2OO6VA2 · pith_short_8: YHHDOQWV

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/YHHDOQWVQ2OO6VA2GQK4NJOWDY \
  | 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: c1ce3742d5869cef541a3415c6a5d61e0659e3f184376dfb8d6ff9adb5728fe7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e91ebf0242f3920773a8665eddc58676d7dfdb198d5639ced4d423ac087cea99",
    "cross_cats_sorted": [
      "stat.AP",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-12-21T22:40:45Z",
    "title_canon_sha256": "21cc299f4f7c6709aa287f7302158889405b4455b29701b4dcdb1a8b569c46d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.08240",
    "kind": "arxiv",
    "version": 4
  }
}