Pith Number

pith:LSRC4GIU

pith:2018:LSRC4GIUFK3H644M7ZBCJAGZFU

not attested not anchored not stored refs pending

A Test of the Active Day Fraction Method of Sunspot Group Number Calibration: Dependence on the Level of Solar Activity

Gennady A. Kovaltsov, Ilya G. Usoskin, Teemu Willamo

arxiv:1803.10501 v1 · 2018-03-28 · 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{LSRC4GIUFK3H644M7ZBCJAGZFU}

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	2026-05-18T00:17:03.633513Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ca22e19142ab67f738cfe422480d92d3b65a8ba022ad602a8fa553c7ffa5051

Aliases

arxiv: 1803.10501 · arxiv_version: 1803.10501v1 · doi: 10.48550/arxiv.1803.10501 · pith_short_12: LSRC4GIUFK3H · pith_short_16: LSRC4GIUFK3H644M · pith_short_8: LSRC4GIU

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/LSRC4GIUFK3H644M7ZBCJAGZFU \
  | 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: 5ca22e19142ab67f738cfe422480d92d3b65a8ba022ad602a8fa553c7ffa5051

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "605edf6e83c9fda929825bb67d685daeb99d5359edb32c0b570e737e1928c621",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-03-28T10:05:30Z",
    "title_canon_sha256": "567074f4f1ce79c95808ae1c0f8816adfb9beb192d0f7d7e14770a682fbb3a68"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.10501",
    "kind": "arxiv",
    "version": 1
  }
}