Pith Number

pith:WAAX3Y66

pith:2012:WAAX3Y66BLC2RKSGZQNYP6Y3P3

not attested not anchored not stored refs pending

The Deep Layers of Sunspot Umbrae

Eberhard Wiehr, Goetz Stellmacher

arxiv:1210.4393 v1 · 2012-10-16 · 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{WAAX3Y66BLC2RKSGZQNYP6Y3P3}

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	2026-05-18T03:43:06.101439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0017de3de0ac5a8aa46cc1b87fb1b7ee35fc89d244fed0439bb67576ebcc49c

Aliases

arxiv: 1210.4393 · arxiv_version: 1210.4393v1 · doi: 10.48550/arxiv.1210.4393 · pith_short_12: WAAX3Y66BLC2 · pith_short_16: WAAX3Y66BLC2RKSG · pith_short_8: WAAX3Y66

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/WAAX3Y66BLC2RKSGZQNYP6Y3P3 \
  | 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: b0017de3de0ac5a8aa46cc1b87fb1b7ee35fc89d244fed0439bb67576ebcc49c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70ca4c546f33c30674fceb7862726c36e9282a2853613d95d8362e14f5c0dc5c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-10-16T13:00:53Z",
    "title_canon_sha256": "afb47311f8ca5b22b4219879137fce7cb4d364961cd22375e2f0b49782b591d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.4393",
    "kind": "arxiv",
    "version": 1
  }
}