Pith Number

pith:T34A5FQM

pith:2018:T34A5FQMFGFHJHR6HS7TB7PHSR

not attested not anchored not stored refs pending

Principal component analysis of sunspot cycle shape

Jouni Takalo, Kalevi Mursula

arxiv:1810.08583 v1 · 2018-10-19 · 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{T34A5FQMFGFHJHR6HS7TB7PHSR}

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	2026-05-17T23:58:36.966246Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9ef80e960c298a749e3e3cbf30fde7947b06f3c4b7df6f7569dfac560306e560

Aliases

arxiv: 1810.08583 · arxiv_version: 1810.08583v1 · doi: 10.48550/arxiv.1810.08583 · pith_short_12: T34A5FQMFGFH · pith_short_16: T34A5FQMFGFHJHR6 · pith_short_8: T34A5FQM

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/T34A5FQMFGFHJHR6HS7TB7PHSR \
  | 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: 9ef80e960c298a749e3e3cbf30fde7947b06f3c4b7df6f7569dfac560306e560

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94aff9072621da6c2b7a6db8ee3fa9ca26313472975697c587009db0d2aa3124",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-10-19T16:52:25Z",
    "title_canon_sha256": "eb5a3b8465c847eb461ed6e7299fd780018b3251692ab10f1e66b1058a39d37c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.08583",
    "kind": "arxiv",
    "version": 1
  }
}