Pith Number

pith:E2D43YAC

pith:2018:E2D43YACDNXF42GIDHYJNQQJL2

not attested not anchored not stored refs pending

Response of solar irradiance to sunspot area variations

A. Shapiro, G. Kopp, M. Kretzschmar, T. Dudok de Wit, V. Witzke

arxiv:1805.04350 v1 · 2018-05-11 · astro-ph.SR · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E2D43YACDNXF42GIDHYJNQQJL2}

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	2026-05-18T00:16:12.729899Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2687cde0021b6e5e68c819f096c2095ea6ec30eebd6e44802181f2a3021a3dfc

Aliases

arxiv: 1805.04350 · arxiv_version: 1805.04350v1 · doi: 10.48550/arxiv.1805.04350 · pith_short_12: E2D43YACDNXF · pith_short_16: E2D43YACDNXF42GI · pith_short_8: E2D43YAC

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/E2D43YACDNXF42GIDHYJNQQJL2 \
  | 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: 2687cde0021b6e5e68c819f096c2095ea6ec30eebd6e44802181f2a3021a3dfc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b7073b79c40f9b250ec40445a8f350931734b955ab972880cd781289f78ce9f",
    "cross_cats_sorted": [
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-05-11T12:10:37Z",
    "title_canon_sha256": "2fa1a4f2a1eeb89544858e7c4caf85a5dc4a10232296e552e0c70a8f956a780b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.04350",
    "kind": "arxiv",
    "version": 1
  }
}