Pith Number

pith:SIRADHKQ

pith:2021:SIRADHKQPQIDZ2EIRFUDV4BDJV

not attested not anchored not stored refs pending

Penumbral decay observed in active region NOAA 12585

I. Ermolli, L. H. M. Rouppe van der Voort, M. Murabito, P. Romano, S. Jafarzadeh, S. L. Guglielmino

arxiv:2106.04936 v1 · 2021-06-09 · 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{SIRADHKQPQIDZ2EIRFUDV4BDJV}

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	2026-07-05T03:14:19.465404Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9222019d507c103ce88889683af0234d638811f164fc1c5acda6f603d0dbabad

Aliases

arxiv: 2106.04936 · arxiv_version: 2106.04936v1 · doi: 10.48550/arxiv.2106.04936 · pith_short_12: SIRADHKQPQID · pith_short_16: SIRADHKQPQIDZ2EI · pith_short_8: SIRADHKQ

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/SIRADHKQPQIDZ2EIRFUDV4BDJV \
  | 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: 9222019d507c103ce88889683af0234d638811f164fc1c5acda6f603d0dbabad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15e6a88b4362f32546bb521e85689adcca4c57cee0e2273f8b49dd53a6db17b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-06-09T09:30:05Z",
    "title_canon_sha256": "ea2eec0c471d6f4d0ee9866a9deba5e54e0cbd7a1baaf698f798b95e2926c7f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.04936",
    "kind": "arxiv",
    "version": 1
  }
}