Pith Number

pith:4N5SASCI

pith:2019:4N5SASCI3QGCNHCHEMUPZ4CFNV

not attested not anchored not stored refs pending

Recent insights on the penumbra formation process

F. Zuccarello, M. Murabito, P.Romano, S.L.Guglielmino

arxiv:1901.05207 v1 · 2019-01-16 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4N5SASCI3QGCNHCHEMUPZ4CFNV}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-17T23:40:33.659230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e37b204848dc0c269c472328fcf0456d78a26ed4911e7ba87e50ae912987a27c

Aliases

arxiv: 1901.05207 · arxiv_version: 1901.05207v1 · doi: 10.48550/arxiv.1901.05207 · pith_short_12: 4N5SASCI3QGC · pith_short_16: 4N5SASCI3QGCNHCH · pith_short_8: 4N5SASCI

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/4N5SASCI3QGCNHCHEMUPZ4CFNV \
  | 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: e37b204848dc0c269c472328fcf0456d78a26ed4911e7ba87e50ae912987a27c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c730a986e0dae5254b672132b6458b3387e8a3bb226e752027561cefab22298b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-01-16T10:16:49Z",
    "title_canon_sha256": "f2438be232e4631194e23e8d632c2a5cd64b645e2db65fd629b571d3f77ea7e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.05207",
    "kind": "arxiv",
    "version": 1
  }
}