Pith Number

pith:SVIFFZBN

pith:2011:SVIFFZBNGFCUV2HVXUPVDQUTHP

not attested not anchored not stored refs pending

Twist, Writhe & Helicity in the inner penumbra of a sunspot

Basilio Ruiz Cobo, Klaus G. Puschmann

arxiv:1111.3881 v2 · 2011-11-16 · 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{SVIFFZBNGFCUV2HVXUPVDQUTHP}

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	2026-05-18T02:21:34.462439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

955052e42d31454ae8f5bd1f51c2933bc5494d7a0e9f19da6c259ede88965f0f

Aliases

arxiv: 1111.3881 · arxiv_version: 1111.3881v2 · doi: 10.48550/arxiv.1111.3881 · pith_short_12: SVIFFZBNGFCU · pith_short_16: SVIFFZBNGFCUV2HV · pith_short_8: SVIFFZBN

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/SVIFFZBNGFCUV2HVXUPVDQUTHP \
  | 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: 955052e42d31454ae8f5bd1f51c2933bc5494d7a0e9f19da6c259ede88965f0f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90c7eea149c12cdb5a79590d0de4286b0b536842b5cd5b5910bf79d354d0cc18",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-11-16T17:34:57Z",
    "title_canon_sha256": "3bee005cd44a07daf62783794324a50731eadcd5c91dbc15adb095f8522dedcf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.3881",
    "kind": "arxiv",
    "version": 2
  }
}