Pith Number

pith:ZVO2Y7HH

pith:2013:ZVO2Y7HHZKNNJPRDAIESXSDCAA

not attested not anchored not stored refs pending

The irregularities of the sunspot cycle and their theoretical modelling

Arnab Rai Choudhuri

arxiv:1312.3408 v1 · 2013-12-12 · 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{ZVO2Y7HHZKNNJPRDAIESXSDCAA}

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	2026-05-18T01:45:51.329218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd5dac7ce7ca9ad4be2302092bc862000f7d5d2959070a2add3a8529148823ce

Aliases

arxiv: 1312.3408 · arxiv_version: 1312.3408v1 · doi: 10.48550/arxiv.1312.3408 · pith_short_12: ZVO2Y7HHZKNN · pith_short_16: ZVO2Y7HHZKNNJPRD · pith_short_8: ZVO2Y7HH

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/ZVO2Y7HHZKNNJPRDAIESXSDCAA \
  | 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: cd5dac7ce7ca9ad4be2302092bc862000f7d5d2959070a2add3a8529148823ce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "767fdd398a3fbcd90667559ac77276610b4418d8536d95a451e24183c40083c8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-12-12T07:00:01Z",
    "title_canon_sha256": "071b6e6c2071edb9ac5d733338a3801f4f3c5ee993be661bdd76e8c595b581ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.3408",
    "kind": "arxiv",
    "version": 1
  }
}