Pith Number

pith:6PU22324

pith:2012:6PU22324C6MNBQAKZY7AWCD7ZH

not attested not anchored not stored refs pending

Computer Model Calibration using the Ensemble Kalman Filter

Charles Jackson, Dave Higdon, Earl Lawrence, James Gattiker, Katrin Heitmann, Matt Pratola, Michael Tobis, Salman Habib, Steve Price

arxiv:1204.3547 v2 · 2012-04-16 · stat.ME · 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{6PU22324C6MNBQAKZY7AWCD7ZH}

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	2026-05-18T03:57:13.833583Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3e9ad6f5c1798d0c00ace3e0b087fc9c6dcc4d756399c7af297b364909fd041

Aliases

arxiv: 1204.3547 · arxiv_version: 1204.3547v2 · doi: 10.48550/arxiv.1204.3547 · pith_short_12: 6PU22324C6MN · pith_short_16: 6PU22324C6MNBQAK · pith_short_8: 6PU22324

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/6PU22324C6MNBQAKZY7AWCD7ZH \
  | 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: f3e9ad6f5c1798d0c00ace3e0b087fc9c6dcc4d756399c7af297b364909fd041

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8df90cd39f1fe0c5afe2bcc3e76c909ec584b38fa4f9b2512cab7b35ad348254",
    "cross_cats_sorted": [
      "stat.CO"
    ],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "stat.ME",
    "submitted_at": "2012-04-16T16:03:23Z",
    "title_canon_sha256": "c4627894356d055c09718a2c5198b35af0eeb107ccca5a65119bb2f5b122518b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.3547",
    "kind": "arxiv",
    "version": 2
  }
}