Pith Number

pith:DBOB5IBF

pith:2019:DBOB5IBFDNFZCKHNPBXX5XIUCU

not attested not anchored not stored refs pending

Prediction of the strength and timing of sunspot cycle 25 reveal decadal-scale space environmental conditions

Dibyendu Nandy, Prantika Bhowmik

arxiv:1909.04537 v1 · 2019-09-10 · 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{DBOB5IBFDNFZCKHNPBXX5XIUCU}

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	2026-07-05T00:03:23.007180Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

185c1ea0251b4b9128ed786f7edd14150f6664487485b41763bbdb79d73d7efc

Aliases

arxiv: 1909.04537 · arxiv_version: 1909.04537v1 · doi: 10.48550/arxiv.1909.04537 · pith_short_12: DBOB5IBFDNFZ · pith_short_16: DBOB5IBFDNFZCKHN · pith_short_8: DBOB5IBF

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/DBOB5IBFDNFZCKHNPBXX5XIUCU \
  | 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: 185c1ea0251b4b9128ed786f7edd14150f6664487485b41763bbdb79d73d7efc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a007eef390754343676dd830f05f2bf37de32220be257f09fd507418cf6dcaed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-09-10T14:51:51Z",
    "title_canon_sha256": "b866656a05da76b981c827899e40938844a5c269a493d2fe3e4503c7b160479b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.04537",
    "kind": "arxiv",
    "version": 1
  }
}