Pith Number

pith:OGU6SUHE

pith:2011:OGU6SUHER53C7N7DNXHFQ45CGH

not attested not anchored not stored refs pending

Ensemble transform Kalman-Bucy filters

Eugenia Kalnay, Javier Amezcua, Kayo Ide, Sebastian Reich

arxiv:1103.2235 v6 · 2011-03-11 · math.NA · math.DS · math.PR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OGU6SUHER53C7N7DNXHFQ45CGH}

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	2026-05-18T03:46:32.460503Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71a9e950e48f762fb7e36dce5873a231ec6c688aff35e249008a263cb81ee6ea

Aliases

arxiv: 1103.2235 · arxiv_version: 1103.2235v6 · doi: 10.48550/arxiv.1103.2235 · pith_short_12: OGU6SUHER53C · pith_short_16: OGU6SUHER53C7N7D · pith_short_8: OGU6SUHE

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/OGU6SUHER53C7N7DNXHFQ45CGH \
  | 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: 71a9e950e48f762fb7e36dce5873a231ec6c688aff35e249008a263cb81ee6ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8daa8ceef6cd6b2cc6da321d3b28b94816dbefd550e1bf9b9e2b12cc7c2a2f1",
    "cross_cats_sorted": [
      "math.DS",
      "math.PR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-03-11T10:32:11Z",
    "title_canon_sha256": "5f5b3359c5c2e534fd8a29be132a5a828eba8557bd419df5336115864230d3cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.2235",
    "kind": "arxiv",
    "version": 6
  }
}