Pith Number

pith:PVYBVHBD

pith:2018:PVYBVHBDDWBDAOZT66T3SETK7S

not attested not anchored not stored refs pending

Neural Network Forecast of the Sunspot Butterfly Diagram

Eurico Covas, Joao Fernandes, Nuno Peixinho

arxiv:1801.04435 v4 · 2018-01-13 · 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{PVYBVHBDDWBDAOZT66T3SETK7S}

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	2026-05-17T23:51:54.785331Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d701a9c231d82303b33f7a7b9126afc8765f682f5190eb36165b08ee9b94227

Aliases

arxiv: 1801.04435 · arxiv_version: 1801.04435v4 · doi: 10.48550/arxiv.1801.04435 · pith_short_12: PVYBVHBDDWBD · pith_short_16: PVYBVHBDDWBDAOZT · pith_short_8: PVYBVHBD

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/PVYBVHBDDWBDAOZT66T3SETK7S \
  | 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: 7d701a9c231d82303b33f7a7b9126afc8765f682f5190eb36165b08ee9b94227

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1993e74c092a123ca2d1e788b0a6f99e3726a047ed4d123c0b176ef3bae4f76b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-01-13T13:17:31Z",
    "title_canon_sha256": "3b7a6dd06566f0dfbe8ef820e63ec73a4aab63847dc7f4340f76ec7544e07548"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.04435",
    "kind": "arxiv",
    "version": 4
  }
}