Pith Number

pith:3NCPXPNX

pith:2015:3NCPXPNX2C4BIMJXG3OX7X3OTT

not attested not anchored not stored refs pending

Multilevel ensemble Kalman filtering

H{\aa}kon Hoel, Kody J. H. Law, Raul Tempone

arxiv:1502.06069 v2 · 2015-02-21 · math.NA · math.PR · 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{3NCPXPNX2C4BIMJXG3OX7X3OTT}

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	2026-05-18T01:11:43.875595Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

db44fbbdb7d0b814313736dd7fdf6e9cd41edb7dfaedf028f6ba42929a1bbfc3

Aliases

arxiv: 1502.06069 · arxiv_version: 1502.06069v2 · doi: 10.48550/arxiv.1502.06069 · pith_short_12: 3NCPXPNX2C4B · pith_short_16: 3NCPXPNX2C4BIMJX · pith_short_8: 3NCPXPNX

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/3NCPXPNX2C4BIMJXG3OX7X3OTT \
  | 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: db44fbbdb7d0b814313736dd7fdf6e9cd41edb7dfaedf028f6ba42929a1bbfc3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b42ff8ba0a53280e24309e3007e1a030c6c43eea126ad73d1d14a81f571b80db",
    "cross_cats_sorted": [
      "math.PR",
      "stat.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-02-21T06:18:37Z",
    "title_canon_sha256": "7458de6da4e9c7faeacc65dfc8a3178990c27235ca50614aa817b170ed3529b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.06069",
    "kind": "arxiv",
    "version": 2
  }
}