Pith Number

pith:HDXP3I3Y

pith:2019:HDXP3I3YMWF2NH6S6MFCGHPCEF

not attested not anchored not stored refs pending

The Physical Nature of Spiral Wave Patterns in Sunspots

Hannah Kwak, Jongchul Chae, Juhyung Kang, Kyeore Lee, Kyuhyoun Cho, Valery M. Nakariakov

arxiv:1905.08908 v1 · 2019-05-22 · 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{HDXP3I3YMWF2NH6S6MFCGHPCEF}

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	2026-05-17T23:45:24.899092Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

38eefda378658ba69fd2f30a231de2214ded271f5c94059d19e856b485b7912e

Aliases

arxiv: 1905.08908 · arxiv_version: 1905.08908v1 · doi: 10.48550/arxiv.1905.08908 · pith_short_12: HDXP3I3YMWF2 · pith_short_16: HDXP3I3YMWF2NH6S · pith_short_8: HDXP3I3Y

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/HDXP3I3YMWF2NH6S6MFCGHPCEF \
  | 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: 38eefda378658ba69fd2f30a231de2214ded271f5c94059d19e856b485b7912e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eee9f7d2b6708f1b295be27509a3b62484d909b3cdb8db51c46158c87eb7bf7b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-05-22T00:29:22Z",
    "title_canon_sha256": "c9e8d0a431c82236777c35440eebef456caf289956eba843ddf49af7fee15fa6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.08908",
    "kind": "arxiv",
    "version": 1
  }
}