Pith Number

pith:VQSZMEF5

pith:2012:VQSZMEF5VLIJYVSJJYEMD4YKS2

not attested not anchored not stored refs pending

The Ensemble Kalman Filter for Inverse Problems

Andrew M. Stuart, Kody J.H. Law, Marco A. Iglesias

arxiv:1209.2736 v3 · 2012-09-12 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VQSZMEF5VLIJYVSJJYEMD4YKS2}

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	2026-05-18T03:28:56.189445Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac259610bdaad09c56494e08c1f30a96ba443a053e45c51555dbe777802b4b62

Aliases

arxiv: 1209.2736 · arxiv_version: 1209.2736v3 · doi: 10.48550/arxiv.1209.2736 · pith_short_12: VQSZMEF5VLIJ · pith_short_16: VQSZMEF5VLIJYVSJ · pith_short_8: VQSZMEF5

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/VQSZMEF5VLIJYVSJJYEMD4YKS2 \
  | 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: ac259610bdaad09c56494e08c1f30a96ba443a053e45c51555dbe777802b4b62

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8177238e420f4b6a946b6b1172f2ff6dc410a3b8696a05f1351167f36fc86db5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-09-12T21:19:44Z",
    "title_canon_sha256": "cd398c0764825fee528511d86825c88d7bce2a0c6e916d4c6b6384da065edfee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.2736",
    "kind": "arxiv",
    "version": 3
  }
}