Pith Number

pith:BMDD2BHQ

pith:2012:BMDD2BHQTHUBKFGAEPRHF5Y5KQ

not attested not anchored not stored refs pending

Waves as the source of apparent twisting motions in sunspot penumbrae

J. Hirzberger, L. Bharti, M. Rempel, R.H. Cameron, S. K. Solanki

arxiv:1204.2221 v1 · 2012-04-10 · 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{BMDD2BHQTHUBKFGAEPRHF5Y5KQ}

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	2026-05-18T01:57:53.937076Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b063d04f099e81514c023e272f71d54302fb4d540b1168381aabfbed2a1288e

Aliases

arxiv: 1204.2221 · arxiv_version: 1204.2221v1 · doi: 10.48550/arxiv.1204.2221 · pith_short_12: BMDD2BHQTHUB · pith_short_16: BMDD2BHQTHUBKFGA · pith_short_8: BMDD2BHQ

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/BMDD2BHQTHUBKFGAEPRHF5Y5KQ \
  | 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: 0b063d04f099e81514c023e272f71d54302fb4d540b1168381aabfbed2a1288e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "192cd05c95d1e55e9c8b24b45176ba03fb6ae581844c0d41012186144292846f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-04-10T17:09:21Z",
    "title_canon_sha256": "16e8f38fb542e3d17d4d7fb1f20c4e0744003f3ef3cda1de34b0248818d909c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2221",
    "kind": "arxiv",
    "version": 1
  }
}