Pith Number

pith:7ZG4KFTP

pith:2018:7ZG4KFTPQBOBQAB6GI4LDE5AMH

not attested not anchored not stored refs pending

Long-term Solar Activity Studies using Microwave Imaging Observations and Prediction for Cycle 25

N. Gopalswamy, P. Makela, S. Akiyama, S. Yashiro

arxiv:1804.02544 v1 · 2018-04-07 · 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{7ZG4KFTPQBOBQAB6GI4LDE5AMH}

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	2026-05-18T00:08:07.753891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe4dc5166f805c18003e3238b193a061fd227678004f1137a17523af4ee1cbdb

Aliases

arxiv: 1804.02544 · arxiv_version: 1804.02544v1 · doi: 10.48550/arxiv.1804.02544 · pith_short_12: 7ZG4KFTPQBOB · pith_short_16: 7ZG4KFTPQBOBQAB6 · pith_short_8: 7ZG4KFTP

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/7ZG4KFTPQBOBQAB6GI4LDE5AMH \
  | 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: fe4dc5166f805c18003e3238b193a061fd227678004f1137a17523af4ee1cbdb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6cce8df8e2a751b7d930ce37bb103bf092a1bbf431aadc800769134dc9e72ef1",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-04-07T11:04:43Z",
    "title_canon_sha256": "12e371ef04076aba51bccc00bbfa728f714e16dccc61dae9e0a36becaf5f852c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.02544",
    "kind": "arxiv",
    "version": 1
  }
}