Pith Number

pith:2IFZ4NMF

pith:2015:2IFZ4NMF2RWZ4HM6OKV5REABOL

not attested not anchored not stored refs pending

The new Sunspot Number: assembling all corrections

Clette, Fr\'ed\'eric, Laure Lef\`evre

arxiv:1510.06928 v1 · 2015-10-23 · 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{2IFZ4NMF2RWZ4HM6OKV5REABOL}

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	2026-07-05T05:30:53.899117Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d20b9e3585d46d9e1d9e72abd8900172f03b78f958e7a2cc6cd499cf6e178de1

Aliases

arxiv: 1510.06928 · arxiv_version: 1510.06928v1 · doi: 10.48550/arxiv.1510.06928 · pith_short_12: 2IFZ4NMF2RWZ · pith_short_16: 2IFZ4NMF2RWZ4HM6 · pith_short_8: 2IFZ4NMF

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/2IFZ4NMF2RWZ4HM6OKV5REABOL \
  | 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: d20b9e3585d46d9e1d9e72abd8900172f03b78f958e7a2cc6cd499cf6e178de1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9978247dc44460656d9b40842316b94809b59cd42e755cc6ed3843ccdf20ad3f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-10-23T13:20:38Z",
    "title_canon_sha256": "310702fd3843d388209d0b5439ec030326f2943f3925545332a9553abd60c4d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.06928",
    "kind": "arxiv",
    "version": 1
  }
}