Pith Number

pith:Z3VXJNN6

pith:2019:Z3VXJNN6VRXUAUFBLTMV2T4QNT

not attested not anchored not stored refs pending

Very early warning signal for El Ni\~no in 2020 with a 4 in 5 likelihood

Armin Bunde, Hans Joachim Schellnhuber, Josef Ludescher, Shlomo Havlin

arxiv:1910.14642 v2 · 2019-10-31 · 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{Z3VXJNN6VRXUAUFBLTMV2T4QNT}

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	2026-07-05T00:41:45.419765Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ceeb74b5beac6f4050a15cd95d4f906cfc1034f598901fa0ca17d7f3921d185f

Aliases

arxiv: 1910.14642 · arxiv_version: 1910.14642v2 · doi: 10.48550/arxiv.1910.14642 · pith_short_12: Z3VXJNN6VRXU · pith_short_16: Z3VXJNN6VRXUAUFB · pith_short_8: Z3VXJNN6

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/Z3VXJNN6VRXUAUFBLTMV2T4QNT \
  | 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: ceeb74b5beac6f4050a15cd95d4f906cfc1034f598901fa0ca17d7f3921d185f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94f576444bd7f9ebbdeb6881e3d9fed52e9ac0c869de3ff8ae16b9b2646adb4e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2019-10-31T17:33:00Z",
    "title_canon_sha256": "1a9339e00d766891fd1e31c8c71b05f3eff633150ee877d7a9fd5c1945bb9e32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1910.14642",
    "kind": "arxiv",
    "version": 2
  }
}