Pith Number

pith:3IWQDAKE

pith:1997:3IWQDAKEFFICHA4NKULZVR3LR6

not attested not anchored not stored refs pending

A dynamical model for the penumbral fine structure and the Evershed effect in sunspots

H.U. Schmidt, K. Jahn, R. Schlichenmaier

arxiv:astro-ph/9712029 v1 · 1997-12-02 · 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{3IWQDAKEFFICHA4NKULZVR3LR6}

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	2026-05-18T01:07:37.942404Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da2d018144295023838d55179ac76b8f82b38b6e8d1480339aa977de2df89318

Aliases

arxiv: astro-ph/9712029 · arxiv_version: astro-ph/9712029v1 · doi: 10.48550/arxiv.astro-ph/9712029 · pith_short_12: 3IWQDAKEFFIC · pith_short_16: 3IWQDAKEFFICHA4N · pith_short_8: 3IWQDAKE

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/3IWQDAKEFFICHA4NKULZVR3LR6 \
  | 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: da2d018144295023838d55179ac76b8f82b38b6e8d1480339aa977de2df89318

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "881f2dac7e208013f6a320b2d29fe3963a26e17085e340dea99af0e0de96c622",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-12-02T16:55:40Z",
    "title_canon_sha256": "63565b4cd75a579adac0977aeea0a5e9deb260df770a92efd9333b33485d11dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9712029",
    "kind": "arxiv",
    "version": 1
  }
}