Pith Number

pith:MWZVEOP7

pith:2011:MWZVEOP7SUMOPTSPVPAYVJ2XFG

not attested not anchored not stored refs pending

A Simple Method to Check the Reliability of Annual Sunspot Number in the Historical Period 1610-1847

J. M. Vaquero, M. C. Gallego, R. M. Trigo

arxiv:1111.2633 v1 · 2011-11-10 · 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{MWZVEOP7SUMOPTSPVPAYVJ2XFG}

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	2026-05-18T01:59:42.215895Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

65b35239ff9518e7ce4fabc18aa7572999ebec7f9f005a78c7bb2aeca83830ef

Aliases

arxiv: 1111.2633 · arxiv_version: 1111.2633v1 · doi: 10.48550/arxiv.1111.2633 · pith_short_12: MWZVEOP7SUMO · pith_short_16: MWZVEOP7SUMOPTSP · pith_short_8: MWZVEOP7

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/MWZVEOP7SUMOPTSPVPAYVJ2XFG \
  | 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: 65b35239ff9518e7ce4fabc18aa7572999ebec7f9f005a78c7bb2aeca83830ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "caeb4f5dad86853d7e25c0629f421e2a645c26e2a66e6941d266db98e3035aca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-11-10T23:59:23Z",
    "title_canon_sha256": "88d6d7682e5788194686e6c01b62aa7ce811fb006d968c3fffb1b519a969a9eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.2633",
    "kind": "arxiv",
    "version": 1
  }
}