Pith Number

pith:OX6EHLE4

pith:2009:OX6EHLE4ZI4VF2UCOOFA2GSHGJ

not attested not anchored not stored refs pending

Why does the Sun's torsional oscillation begin before the sunspot cycle?

Arnab Rai Choudhuri, Piyali Chatterjee, Sagar Chakraborty

arxiv:0907.4842 v1 · 2009-07-28 · 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{OX6EHLE4ZI4VF2UCOOFA2GSHGJ}

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	2026-05-18T04:34:55.481242Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75fc43ac9cca3952ea82738a0d1a473267646c1463736d8350f17667d3d719a2

Aliases

arxiv: 0907.4842 · arxiv_version: 0907.4842v1 · doi: 10.48550/arxiv.0907.4842 · pith_short_12: OX6EHLE4ZI4V · pith_short_16: OX6EHLE4ZI4VF2UC · pith_short_8: OX6EHLE4

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/OX6EHLE4ZI4VF2UCOOFA2GSHGJ \
  | 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: 75fc43ac9cca3952ea82738a0d1a473267646c1463736d8350f17667d3d719a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6c38fd3526844ebde704ce1bfdf331eb5e0b43377560496ccf67d84c422f1f5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-07-28T18:08:40Z",
    "title_canon_sha256": "cb2da5e48ebf69d0585ddf04b4f66aca720a69b18bac40f92019287d66275279"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4842",
    "kind": "arxiv",
    "version": 1
  }
}