Pith Number

pith:6A5ENGNU

pith:2021:6A5ENGNUHMSJXLRJP3Y46IPW4U

not attested not anchored not stored refs pending

Nonparametric monitoring of sunspot number observations: a case study

Christian Ritter, Fr\'ed\'eric Clette, Laure Lef\`evre, Rainer von Sachs, Sophie Mathieu, V\'eronique Delouille

arxiv:2106.13535 v1 · 2021-06-25 · astro-ph.SR · stat.AP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6A5ENGNUHMSJXLRJP3Y46IPW4U}

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	2026-07-05T05:32:19.941886Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f03a4699b43b249bae297ef1cf21f6e51d796051e41d23955b080201d3e73bfe

Aliases

arxiv: 2106.13535 · arxiv_version: 2106.13535v1 · doi: 10.48550/arxiv.2106.13535 · pith_short_12: 6A5ENGNUHMSJ · pith_short_16: 6A5ENGNUHMSJXLRJ · pith_short_8: 6A5ENGNU

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/6A5ENGNUHMSJXLRJP3Y46IPW4U \
  | 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: f03a4699b43b249bae297ef1cf21f6e51d796051e41d23955b080201d3e73bfe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4da724472c6082185b8e419905f9e825d49ea92a1af0edf2e79f39f718a3b0bb",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-06-25T09:59:28Z",
    "title_canon_sha256": "307f230789b7586d04b98b06a2e9c53b1fe559dfe264b246b71395afe6291a17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.13535",
    "kind": "arxiv",
    "version": 1
  }
}