Pith Number

pith:PL6DU2QN

pith:2009:PL6DU2QNHHNAD6NL32HRXMBBAJ

not attested not anchored not stored refs pending

On the Convergence of the Ensemble Kalman Filter

Jan Mandel, Jonathan D. Beezley, Loren Cobb

arxiv:0901.2951 v2 · 2009-01-20 · math.ST · math.PR · physics.ao-ph · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PL6DU2QNHHNAD6NL32HRXMBBAJ}

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	2026-05-18T04:03:44.009504Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7afc3a6a0d39da01f9abde8f1bb021027191f2358ce90edad233217b6403baa6

Aliases

arxiv: 0901.2951 · arxiv_version: 0901.2951v2 · doi: 10.48550/arxiv.0901.2951 · pith_short_12: PL6DU2QNHHNA · pith_short_16: PL6DU2QNHHNAD6NL · pith_short_8: PL6DU2QN

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/PL6DU2QNHHNAD6NL32HRXMBBAJ \
  | 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: 7afc3a6a0d39da01f9abde8f1bb021027191f2358ce90edad233217b6403baa6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b550279e2611b5d6c5add930177b9ff9369ecb8115f7a0975a8c3a9226ab84f6",
    "cross_cats_sorted": [
      "math.PR",
      "physics.ao-ph",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2009-01-20T00:42:41Z",
    "title_canon_sha256": "f4de3a09990a7478cdaf9073989cf1b93be5812561b34231c494d46b0df83f35"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.2951",
    "kind": "arxiv",
    "version": 2
  }
}