Pith Number

pith:OPTEOTK5

pith:2013:OPTEOTK5P63ND3SSC45RTK4JSZ

not attested not anchored not stored refs pending

Solar Cycle Variability and Surface Differential Rotation from Ca II K-Line Time Series Data

Jeffrey Scargle, Pete Worden, Stephen Keil

arxiv:1303.6303 v1 · 2013-03-25 · 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{OPTEOTK5P63ND3SSC45RTK4JSZ}

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	2026-05-18T01:50:52.959275Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73e6474d5d7fb6d1ee52173b19ab899677097ab029d95397f625eaf3eb9abb06

Aliases

arxiv: 1303.6303 · arxiv_version: 1303.6303v1 · doi: 10.48550/arxiv.1303.6303 · pith_short_12: OPTEOTK5P63N · pith_short_16: OPTEOTK5P63ND3SS · pith_short_8: OPTEOTK5

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/OPTEOTK5P63ND3SSC45RTK4JSZ \
  | 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: 73e6474d5d7fb6d1ee52173b19ab899677097ab029d95397f625eaf3eb9abb06

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5b00aaa2d733ac4a283e0ac268824d26d80f4eca8201b6b3bc470ceabd605c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-03-25T20:24:28Z",
    "title_canon_sha256": "99df72a608b049c208bc0552cc0ae1c7b6bb5520e97029fbaa0d403d6379a107"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.6303",
    "kind": "arxiv",
    "version": 1
  }
}