Pith Number

pith:ATVTXASX

pith:2015:ATVTXASXLVNTX45ATKWV7UX6NQ

not attested not anchored not stored refs pending

Transition of the Sunspot Number from Zurich to Brussels in 1980: A Personal Perspective

J.O. Stenflo

arxiv:1512.06229 v1 · 2015-12-19 · physics.hist-ph · 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{ATVTXASXLVNTX45ATKWV7UX6NQ}

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	2026-05-18T01:21:25.736810Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

04eb3b82575d5b3bf3a09aad5fd2fe6c3c62a1440a7fa24f6f0863d52c9543ac

Aliases

arxiv: 1512.06229 · arxiv_version: 1512.06229v1 · doi: 10.48550/arxiv.1512.06229 · pith_short_12: ATVTXASXLVNT · pith_short_16: ATVTXASXLVNTX45A · pith_short_8: ATVTXASX

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/ATVTXASXLVNTX45ATKWV7UX6NQ \
  | 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: 04eb3b82575d5b3bf3a09aad5fd2fe6c3c62a1440a7fa24f6f0863d52c9543ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f9e27f12a829cd9def978d33697b2b2cc16bd18428a4a9a8f1f3726442c1123f",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2015-12-19T11:45:21Z",
    "title_canon_sha256": "2633a36c2ac7b7de8c89a6511665734bd57065300f21e8820a7498dd7640e5a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.06229",
    "kind": "arxiv",
    "version": 1
  }
}