Pith Number

pith:YAQCKPUO

pith:2016:YAQCKPUOQ7M7OA4UTCGYWF3L4E

not attested not anchored not stored refs pending

A Revised Collection of Sunspot Group Numbers

A.J.P. Aparicio, F. Clette, J.-G. Richard, J.M. Vaquero, L. Lef\`evre, L. Svalgaard, M.C. Gallego, R. Arlt, R. Howe, V.M.S. Carrasco

arxiv:1609.04882 v1 · 2016-09-15 · 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{YAQCKPUOQ7M7OA4UTCGYWF3L4E}

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	2026-07-05T05:30:53.992147Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c020253e8e87d9f70394988d8b176be122c748db0cfbc726f19a3680dbad0ee1

Aliases

arxiv: 1609.04882 · arxiv_version: 1609.04882v1 · doi: 10.48550/arxiv.1609.04882 · pith_short_12: YAQCKPUOQ7M7 · pith_short_16: YAQCKPUOQ7M7OA4U · pith_short_8: YAQCKPUO

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/YAQCKPUOQ7M7OA4UTCGYWF3L4E \
  | 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: c020253e8e87d9f70394988d8b176be122c748db0cfbc726f19a3680dbad0ee1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36e034a945d83c049c6c2c89921c74cb0314ebf88431727304bec24b040f906e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2016-09-15T23:24:49Z",
    "title_canon_sha256": "00159af69535f39d7e45c2eb072f9e314229cdab8377a9cab743155b43b1f1ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.04882",
    "kind": "arxiv",
    "version": 1
  }
}