Pith Number

pith:YEQGT4LK

pith:2009:YEQGT4LKPLBAXK6K3ASKO7X2VB

not attested not anchored not stored refs pending

155-day Periodicity in Solar Cycles 3 and 4

J. M. Vaquero, M. C. Gallego, M. Vazquez, R. M. Trigo

arxiv:0911.2578 v1 · 2009-11-13 · 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{YEQGT4LKPLBAXK6K3ASKO7X2VB}

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	2026-05-18T02:34:10.989267Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c12069f16a7ac20babcad824a77efaa84441e3f4ee5ce0b27f518d6561036327

Aliases

arxiv: 0911.2578 · arxiv_version: 0911.2578v1 · doi: 10.48550/arxiv.0911.2578 · pith_short_12: YEQGT4LKPLBA · pith_short_16: YEQGT4LKPLBAXK6K · pith_short_8: YEQGT4LK

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/YEQGT4LKPLBAXK6K3ASKO7X2VB \
  | 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: c12069f16a7ac20babcad824a77efaa84441e3f4ee5ce0b27f518d6561036327

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfe118d602161db95aad9c68a7e56263d608c95b587978e9384a4fc8e5d329d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-11-13T09:40:29Z",
    "title_canon_sha256": "d81691a813fc53b74fed8ea5c172b1c35f6d87bfe5fff94dc442479c8a0b4f70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2578",
    "kind": "arxiv",
    "version": 1
  }
}