Pith Number

pith:R2EZNZ2R

pith:2022:R2EZNZ2RAGTP2QJFSTNUYIBEEJ

not attested not anchored not stored refs pending

A comparative study of non-deep learning, deep learning, and ensemble learning methods for sunspot number prediction

Hai Shu, Heng Li, Yuchen Dang, Ziqi Chen

arxiv:2203.05757 v2 · 2022-03-11 · astro-ph.SR · cs.AI · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R2EZNZ2RAGTP2QJFSTNUYIBEEJ}

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	2026-07-05T04:26:22.583402Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e8996e75101a6fd412594db4c2024227eae59b80410393f6ded44a6a4771d2a

Aliases

arxiv: 2203.05757 · arxiv_version: 2203.05757v2 · doi: 10.48550/arxiv.2203.05757 · pith_short_12: R2EZNZ2RAGTP · pith_short_16: R2EZNZ2RAGTP2QJF · pith_short_8: R2EZNZ2R

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/R2EZNZ2RAGTP2QJFSTNUYIBEEJ \
  | 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: 8e8996e75101a6fd412594db4c2024227eae59b80410393f6ded44a6a4771d2a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3c1917b5f025e74d4d7d2b5d3fe69ac7447345da3b4673259ec756e7863c884",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2022-03-11T05:11:31Z",
    "title_canon_sha256": "3072a4ade47bc096a7a4b9a431aafd95da3db3277d5be1a77282a676788924ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.05757",
    "kind": "arxiv",
    "version": 2
  }
}