Pith Number

pith:OPNSQLOU

pith:2013:OPNSQLOU66ASDI34DXZ4DCKV6V

not attested not anchored not stored refs pending

Improved El Ni\~no-Forecasting by Cooperativity Detection

Armin Bunde, Avi Gozolchiani, Hans Joachim Schellnhuber, Josef Ludescher, Mikhail I. Bogachev, Shlomo Havlin

arxiv:1304.8039 v1 · 2013-04-30 · physics.ao-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OPNSQLOU66ASDI34DXZ4DCKV6V}

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	2026-05-18T01:50:14.031410Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73db282dd4f78121a37c1df3c18955f560e7a8b1f4ea071ba0efd18e8cabbace

Aliases

arxiv: 1304.8039 · arxiv_version: 1304.8039v1 · doi: 10.48550/arxiv.1304.8039 · pith_short_12: OPNSQLOU66AS · pith_short_16: OPNSQLOU66ASDI34 · pith_short_8: OPNSQLOU

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/OPNSQLOU66ASDI34DXZ4DCKV6V \
  | 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: 73db282dd4f78121a37c1df3c18955f560e7a8b1f4ea071ba0efd18e8cabbace

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0275f2970b43dc46a6ec68f122d3d493a75b14546a6942aa7eb53dc46c06d39",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2013-04-30T15:42:49Z",
    "title_canon_sha256": "c5b7fdbbe1f0831add2914aa5690800d08954b342c3b11711346fd01ada41d8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.8039",
    "kind": "arxiv",
    "version": 1
  }
}