Pith Number

pith:WJ76OXFA

pith:2012:WJ76OXFAVXNDYXKO55334FINHS

not attested not anchored not stored refs pending

Analysis of the 3DVAR Filter for the Partially Observed Lorenz '63 Model

A. M. Stuart, A. Shukla, K. J. H. Law

arxiv:1212.4923 v2 · 2012-12-20 · math.DS · math.OC · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WJ76OXFAVXNDYXKO55334FINHS}

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	2026-05-18T03:28:55.937291Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b27fe75ca0adda3c5d4eef77be150d3c9ccee676d3e37770557493f1700ac299

Aliases

arxiv: 1212.4923 · arxiv_version: 1212.4923v2 · doi: 10.48550/arxiv.1212.4923 · pith_short_12: WJ76OXFAVXND · pith_short_16: WJ76OXFAVXNDYXKO · pith_short_8: WJ76OXFA

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/WJ76OXFAVXNDYXKO55334FINHS \
  | 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: b27fe75ca0adda3c5d4eef77be150d3c9ccee676d3e37770557493f1700ac299

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a3c99b2314956ae86efa31f863b91847110b5b9e52ca7d9c02a58c41b805c1d",
    "cross_cats_sorted": [
      "math.OC",
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2012-12-20T04:50:15Z",
    "title_canon_sha256": "52572fe7d0a42b14627b229e79fbfa9ca1aca3743262c45eaca26518c64704d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.4923",
    "kind": "arxiv",
    "version": 2
  }
}