Pith Number

pith:ZP6FRURN

pith:2013:ZP6FRURNHVETESSSSTV4BM3YYI

not attested not anchored not stored refs pending

Formation of a penumbra in a decaying sunspot

Christian Beck, Horst Balthasar, Klaus G. Puschmann, Rohan E. Louis, Shibu K. Mathew

arxiv:1303.3599 v1 · 2013-03-14 · 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{ZP6FRURNHVETESSSSTV4BM3YYI}

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	2026-05-18T01:51:07.113166Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cbfc58d22d3d49324a5294ebc0b378c22e5e24eae525091bca69e63e60b5b49c

Aliases

arxiv: 1303.3599 · arxiv_version: 1303.3599v1 · doi: 10.48550/arxiv.1303.3599 · pith_short_12: ZP6FRURNHVET · pith_short_16: ZP6FRURNHVETESSS · pith_short_8: ZP6FRURN

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/ZP6FRURNHVETESSSSTV4BM3YYI \
  | 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: cbfc58d22d3d49324a5294ebc0b378c22e5e24eae525091bca69e63e60b5b49c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1918c748b852e32a0ef839e0f4fb91731c9a7cfd6c6d5de5b71c033f9c32f512",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-03-14T20:42:44Z",
    "title_canon_sha256": "ac6974387451ec09f8a5cca7305c9b07a487f12fdc7aca8da2749bd94ef9ada7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.3599",
    "kind": "arxiv",
    "version": 1
  }
}