Pith Number

pith:FH57FHIQ

pith:2017:FH57FHIQAX7EWZ2KGMMRYTGKQ3

not attested not anchored not stored refs pending

Sunspot Group Numbers Since 1900 and Implications for the Long-term Record of Solar Activity

Kenneth H. Schatten, Leif Svalgaard

arxiv:1705.02024 v1 · 2017-05-04 · 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{FH57FHIQAX7EWZ2KGMMRYTGKQ3}

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	2026-05-18T00:45:00.795717Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29fbf29d1005fe4b674a33191c4cca86dca9c977ac3127a7116f16df020f49e8

Aliases

arxiv: 1705.02024 · arxiv_version: 1705.02024v1 · doi: 10.48550/arxiv.1705.02024 · pith_short_12: FH57FHIQAX7E · pith_short_16: FH57FHIQAX7EWZ2K · pith_short_8: FH57FHIQ

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/FH57FHIQAX7EWZ2KGMMRYTGKQ3 \
  | 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: 29fbf29d1005fe4b674a33191c4cca86dca9c977ac3127a7116f16df020f49e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e394af9377f18fd201e8fa944a6ed3e8792b809d58f620ba1db70830c6f2cc31",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2017-05-04T21:18:36Z",
    "title_canon_sha256": "9f0af9957f88da40aa0e8a45333a1747810143bee526f2de4532a572ab02d002"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.02024",
    "kind": "arxiv",
    "version": 1
  }
}