Pith Number

pith:H55KGQIR

pith:2019:H55KGQIRCAASZAUWPV2XMZIOGJ

not attested not anchored not stored refs pending

Solar cycle activity: an early prediction for cycle #25

Stefano Sello

arxiv:1902.05294 v1 · 2019-02-14 · 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{H55KGQIRCAASZAUWPV2XMZIOGJ}

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	2026-05-17T23:54:01.324984Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f7aa3411110012c82967d7576650e3250dec5b6303879965bddb69fc4c87c13

Aliases

arxiv: 1902.05294 · arxiv_version: 1902.05294v1 · doi: 10.48550/arxiv.1902.05294 · pith_short_12: H55KGQIRCAAS · pith_short_16: H55KGQIRCAASZAUW · pith_short_8: H55KGQIR

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/H55KGQIRCAASZAUWPV2XMZIOGJ \
  | 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: 3f7aa3411110012c82967d7576650e3250dec5b6303879965bddb69fc4c87c13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be14b049fe3b9ee10624e86646fb227e2b583a9352bbf5e5f6396ec8f6f2a2ef",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-02-14T10:39:16Z",
    "title_canon_sha256": "c1c59f5259c261a6fb5af1b76fcded0b35baaeb3cdb397eccd0f3dd470e50fde"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.05294",
    "kind": "arxiv",
    "version": 1
  }
}