Pith Number

pith:GCUNQ3EV

pith:2015:GCUNQ3EV5EBYBUNGG7UYQSRD6C

not attested not anchored not stored refs pending

Tree-Structured Modelling of Categorical Predictors in Regression

Gerhard Tutz, Moritz Berger

arxiv:1504.04700 v1 · 2015-04-18 · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GCUNQ3EV5EBYBUNGG7UYQSRD6C}

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	2026-05-18T02:18:25.076838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

30a8d86c95e90380d1a637e9884a23f0a0aef1272c6f16759eb1c8e59ecb009f

Aliases

arxiv: 1504.04700 · arxiv_version: 1504.04700v1 · doi: 10.48550/arxiv.1504.04700 · pith_short_12: GCUNQ3EV5EBY · pith_short_16: GCUNQ3EV5EBYBUNG · pith_short_8: GCUNQ3EV

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/GCUNQ3EV5EBYBUNGG7UYQSRD6C \
  | 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: 30a8d86c95e90380d1a637e9884a23f0a0aef1272c6f16759eb1c8e59ecb009f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5254074ebbe2efe12da1f3b1211fc8783d76087015057c31c4e0a194f17ba0a3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-04-18T09:26:55Z",
    "title_canon_sha256": "cc1b26a30e825cb45f81eb1afd525ef4f77fb95dd682d8ad0201350bf259783f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.04700",
    "kind": "arxiv",
    "version": 1
  }
}