Pith Number

pith:SZRCRRLA

pith:2013:SZRCRRLA72SLMHNJFOTWLXWIT2

not attested not anchored not stored refs pending

Hyperparameter Optimization and Boosting for Classifying Facial Expressions: How good can a "Null" Model be?

David D. Cox, James Bergstra

arxiv:1306.3476 v1 · 2013-06-14 · cs.CV · cs.LG · 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{SZRCRRLA72SLMHNJFOTWLXWIT2}

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	2026-05-18T03:20:57.587955Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

966228c560fea4b61da92ba765dec89eb5ea6dd2ed5dff7e44da90736f9ee693

Aliases

arxiv: 1306.3476 · arxiv_version: 1306.3476v1 · doi: 10.48550/arxiv.1306.3476 · pith_short_12: SZRCRRLA72SL · pith_short_16: SZRCRRLA72SLMHNJ · pith_short_8: SZRCRRLA

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/SZRCRRLA72SLMHNJFOTWLXWIT2 \
  | 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: 966228c560fea4b61da92ba765dec89eb5ea6dd2ed5dff7e44da90736f9ee693

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4aba609ec268e5803cdb0d2448189845c9659e75255862e556b7f6de95494c76",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2013-06-14T18:28:52Z",
    "title_canon_sha256": "2c30dc938e80c43207382c1167610d0900464252cf3c9634f43339a69a1cf08c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.3476",
    "kind": "arxiv",
    "version": 1
  }
}