Pith Number

pith:RA5C2KJU

pith:2015:RA5C2KJUFDKLXJW3C3H4I7OMZG

not attested not anchored not stored refs pending

Cross-Validated Variable Selection in Tree-Based Methods Improves Predictive Performance

Amichai Painsky, Saharon Rosset

arxiv:1512.03444 v1 · 2015-12-10 · 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{RA5C2KJUFDKLXJW3C3H4I7OMZG}

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	2026-05-18T01:24:32.430950Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

883a2d293428d4bba6db16cfc47dccc99b445eba0117f3453b68213b82477978

Aliases

arxiv: 1512.03444 · arxiv_version: 1512.03444v1 · doi: 10.48550/arxiv.1512.03444 · pith_short_12: RA5C2KJUFDKL · pith_short_16: RA5C2KJUFDKLXJW3 · pith_short_8: RA5C2KJU

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/RA5C2KJUFDKLXJW3C3H4I7OMZG \
  | 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: 883a2d293428d4bba6db16cfc47dccc99b445eba0117f3453b68213b82477978

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "589040bf23f7ae41e5ba8e8b585a3a22f94a11a810bcbc7627cb5ac3d259a101",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2015-12-10T21:20:14Z",
    "title_canon_sha256": "b6eea4483b2399e1644cd6d51ef4db497ff5fe6e0d78c4f535d7088e9d0e78e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.03444",
    "kind": "arxiv",
    "version": 1
  }
}