Pith Number

pith:BIRJ64IM

pith:2009:BIRJ64IMJTRAYWQ333BZCUZUZC

not attested not anchored not stored refs pending

Multiple and changing cycles of active stars I. Methods of analysis and application to the solar cycles

K. Ol\'ah, Z. Koll\'ath

arxiv:0904.1725 v1 · 2009-04-10 · 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{BIRJ64IMJTRAYWQ333BZCUZUZC}

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	2026-05-18T02:14:06.525980Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a229f710c4ce20c5a1bdec3915334c8b442191be7c99899f26487491afe81be

Aliases

arxiv: 0904.1725 · arxiv_version: 0904.1725v1 · doi: 10.48550/arxiv.0904.1725 · pith_short_12: BIRJ64IMJTRA · pith_short_16: BIRJ64IMJTRAYWQ3 · pith_short_8: BIRJ64IM

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/BIRJ64IMJTRAYWQ333BZCUZUZC \
  | 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: 0a229f710c4ce20c5a1bdec3915334c8b442191be7c99899f26487491afe81be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5b973ad2e087f9ab2f73d41c075dca28a0a3ce0d8ac7920173523f19a0bc9b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-04-10T18:33:05Z",
    "title_canon_sha256": "8d6cf8f5cdc65cd6cf3af78b9dd904d79a9e52c53dbdc4092612e762c202d4a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.1725",
    "kind": "arxiv",
    "version": 1
  }
}