Pith Number

pith:AMA73OCT

pith:2011:AMA73OCTCP7GNU3B5XCPGJ2MSG

not attested not anchored not stored refs pending

Robust ensemble filtering and its relation to covariance inflation in the ensemble Kalman filter

Ibrahim Hoteit, Xiaodong Luo

arxiv:1108.0158 v1 · 2011-07-31 · physics.data-an · nlin.CD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AMA73OCTCP7GNU3B5XCPGJ2MSG}

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	2026-05-18T02:01:05.159812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0301fdb85313fe66d361edc4f3274c918b13ba790f009b1621acbc399d4c509b

Aliases

arxiv: 1108.0158 · arxiv_version: 1108.0158v1 · doi: 10.48550/arxiv.1108.0158 · pith_short_12: AMA73OCTCP7G · pith_short_16: AMA73OCTCP7GNU3B · pith_short_8: AMA73OCT

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/AMA73OCTCP7GNU3B5XCPGJ2MSG \
  | 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: 0301fdb85313fe66d361edc4f3274c918b13ba790f009b1621acbc399d4c509b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02aded56d790d09004ac6bd0eb5f3de01433f5822ac33205e485b5a9704e69d4",
    "cross_cats_sorted": [
      "nlin.CD"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.data-an",
    "submitted_at": "2011-07-31T08:51:23Z",
    "title_canon_sha256": "0fe4c2c49c3ab8f09d25328c240516816cd8baf54b885d279907839cb0d80f3f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.0158",
    "kind": "arxiv",
    "version": 1
  }
}