Pith Number

pith:FRVVZDB7

pith:2017:FRVVZDB7UJCL7ZH4QULF57Y65A

not attested not anchored not stored refs pending

Assessment of the Failure of Active Days Fraction Method of Sunspot Group Number Reconstructions

Kenneth H. Schatten, Leif Svalgaard

arxiv:1706.01154 v1 · 2017-06-04 · 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{FRVVZDB7UJCL7ZH4QULF57Y65A}

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	2026-05-18T00:34:29.106333Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c6b5c8c3fa244bfe4fc85165eff1ee81852fa0188fb855ca42d02fdaafd5473

Aliases

arxiv: 1706.01154 · arxiv_version: 1706.01154v1 · doi: 10.48550/arxiv.1706.01154 · pith_short_12: FRVVZDB7UJCL · pith_short_16: FRVVZDB7UJCL7ZH4 · pith_short_8: FRVVZDB7

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/FRVVZDB7UJCL7ZH4QULF57Y65A \
  | 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: 2c6b5c8c3fa244bfe4fc85165eff1ee81852fa0188fb855ca42d02fdaafd5473

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee58d191b25d4590921f0589f71eba3e03ccab3d27027d568e167bc12ee02eab",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-06-04T22:19:17Z",
    "title_canon_sha256": "cab6625c3cbeabd5e6a0d471ce00e2432095462c7199ef919aad85dd4be4afe4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.01154",
    "kind": "arxiv",
    "version": 1
  }
}