Pith Number

pith:EX4RFUJT

pith:2022:EX4RFUJTUGVUFT44GKC36ROXYH

not attested not anchored not stored refs pending

Scrutinizing the relationship between plage areas and sunspot areas and numbers

Ilaria Ermolli, Jean-Marie Malherbe, Natalie A. Krivova, Sara Carvalho, Teresa Barata, Theodosios Chatzistergos

arxiv:2209.07077 v1 · 2022-09-15 · 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{EX4RFUJTUGVUFT44GKC36ROXYH}

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	2026-07-05T05:20:48.813245Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25f912d133a1ab42cf9c3285bf45d7c1d7054e892b1397c896327801c8a4abaa

Aliases

arxiv: 2209.07077 · arxiv_version: 2209.07077v1 · doi: 10.48550/arxiv.2209.07077 · pith_short_12: EX4RFUJTUGVU · pith_short_16: EX4RFUJTUGVUFT44 · pith_short_8: EX4RFUJT

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/EX4RFUJTUGVUFT44GKC36ROXYH \
  | 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: 25f912d133a1ab42cf9c3285bf45d7c1d7054e892b1397c896327801c8a4abaa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28ff6a76eda3626fd05c294225ed7a447842274013c6868d0b038a20aea3938d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2022-09-15T06:24:54Z",
    "title_canon_sha256": "bb59f95c0b5635c0db2d14b2ceb3bdf1b6cac339023778015b16f12b504ad5c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2209.07077",
    "kind": "arxiv",
    "version": 1
  }
}