Pith Number

pith:NPDQU2DB

pith:2014:NPDQU2DB7I6IZAHODLMDYFM2CM

not attested not anchored not stored refs pending

Ensemble Kalman filtering with a divided state-space strategy for coupled data assimilation problems

Ibrahim Hoteit, Xiaodong Luo

arxiv:1408.4236 v1 · 2014-08-19 · physics.ao-ph · math.NA · nlin.CD · physics.data-an · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NPDQU2DB7I6IZAHODLMDYFM2CM}

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	2026-05-18T01:42:17.601842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bc70a6861fa3c8c80ee1ad83c159a1300d9bfdd80a10b64a02c346bd3dc484b

Aliases

arxiv: 1408.4236 · arxiv_version: 1408.4236v1 · doi: 10.48550/arxiv.1408.4236 · pith_short_12: NPDQU2DB7I6I · pith_short_16: NPDQU2DB7I6IZAHO · pith_short_8: NPDQU2DB

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/NPDQU2DB7I6IZAHODLMDYFM2CM \
  | 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: 6bc70a6861fa3c8c80ee1ad83c159a1300d9bfdd80a10b64a02c346bd3dc484b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d046c330d689845b7f92912b12ce8b25529f936609ebcee7dcc0f29730c050b1",
    "cross_cats_sorted": [
      "math.NA",
      "nlin.CD",
      "physics.data-an",
      "stat.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2014-08-19T07:51:06Z",
    "title_canon_sha256": "a37cb67dfd3ae6bc2e78be6635a823fde102b7a3e14b041d9b7f302b27b9f759"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.4236",
    "kind": "arxiv",
    "version": 1
  }
}