Pith Number

pith:WTG2LAIA

pith:2009:WTG2LAIARKPUJ6DDVQGNOFBVEK

not attested not anchored not stored refs pending

Relative Expected Improvement in Kriging Based Optimization

{\L}ukasz {\L}aniewski-Wo{\l}{\l}k

arxiv:0908.3321 v1 · 2009-08-23 · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WTG2LAIARKPUJ6DDVQGNOFBVEK}

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	2026-07-04T15:48:18.118746Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4cda581008a9f44f863ac0cd7143522988ce116a2ad73eccdc39222b303f90a

Aliases

arxiv: 0908.3321 · arxiv_version: 0908.3321v1 · doi: 10.48550/arxiv.0908.3321 · pith_short_12: WTG2LAIARKPU · pith_short_16: WTG2LAIARKPUJ6DD · pith_short_8: WTG2LAIA

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/WTG2LAIARKPUJ6DDVQGNOFBVEK \
  | 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: b4cda581008a9f44f863ac0cd7143522988ce116a2ad73eccdc39222b303f90a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c4b38922ede352ca9243c6e0b27609574c1a93684d935255c3e42735a638c4a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2009-08-23T17:45:07Z",
    "title_canon_sha256": "9a4258b6811b58e2f007608187f5c898bfd88676bda87f674cf0486d37fb6629"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3321",
    "kind": "arxiv",
    "version": 1
  }
}