Pith Number

pith:IFIRRYGA

pith:1997:IFIRRYGAAP6DGYSRO6MEMBKOJR

not attested not anchored not stored refs pending

Making Sense of Sunspot Decay I: Parabolic Decay Law and Gnevyshev-Waldmeier Relation

K. Petrovay, L. van Driel-Gesztelyi

arxiv:astro-ph/9706029 v2 · 1997-06-03 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IFIRRYGAAP6DGYSRO6MEMBKOJR}

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	2026-05-18T01:40:17.385034Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

415118e0c003fc336251779846054e4c4f34da324ec769fd9a7ad6908f48cf6f

Aliases

arxiv: astro-ph/9706029 · arxiv_version: astro-ph/9706029v2 · doi: 10.48550/arxiv.astro-ph/9706029 · pith_short_12: IFIRRYGAAP6D · pith_short_16: IFIRRYGAAP6DGYSR · pith_short_8: IFIRRYGA

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/IFIRRYGAAP6DGYSRO6MEMBKOJR \
  | 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: 415118e0c003fc336251779846054e4c4f34da324ec769fd9a7ad6908f48cf6f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8dc1c16bcfd895325ca30c0cfa6fa890c7ba1326e8368b8e4c38d4f2bb5d8fc7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-06-03T17:38:58Z",
    "title_canon_sha256": "0592c9d0a8ae3d995ab35d88687772d1604dba363e2c318e0b784c31ab523685"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9706029",
    "kind": "arxiv",
    "version": 2
  }
}