Pith Number

pith:7JUCL45K

pith:2011:7JUCL45K7TMINADMF26AH5GYBS

not attested not anchored not stored refs pending

Evolution of sunspot properties during solar cycle 23

Fraser T. Watson, Lyndsay Fletcher, Stephen Marshall

arxiv:1108.4285 v1 · 2011-08-22 · 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{7JUCL45K7TMINADMF26AH5GYBS}

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	2026-05-18T04:14:55.802558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa6825f3aafcd886806c2ebc03f4d80c81dc0f6f554938eb1f482f68b0ac22d1

Aliases

arxiv: 1108.4285 · arxiv_version: 1108.4285v1 · doi: 10.48550/arxiv.1108.4285 · pith_short_12: 7JUCL45K7TMI · pith_short_16: 7JUCL45K7TMINADM · pith_short_8: 7JUCL45K

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/7JUCL45K7TMINADMF26AH5GYBS \
  | 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: fa6825f3aafcd886806c2ebc03f4d80c81dc0f6f554938eb1f482f68b0ac22d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c205ad6ecea20d93bc1dd1c6499238d82e6681eaf52554502114a899b9473604",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-08-22T12:00:27Z",
    "title_canon_sha256": "17bb9df650bfeb2bf987f29e7d9af60daebfd9258313e55ab66dc329dbf43e86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.4285",
    "kind": "arxiv",
    "version": 1
  }
}