Pith Number

pith:SZJEROZ2

pith:2026:SZJEROZ2QHZOVZFDWLPNDWJWDV

not attested not anchored not stored refs pending

A tool to determine the degrees of freedom in tree-structured varying coefficient models

Moritz Berger, Nikolai Spuck

arxiv:2605.18206 v1 · 2026-05-18 · 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{SZJEROZ2QHZOVZFDWLPNDWJWDV}

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	2026-05-20T00:05:50.541826Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

965248bb3a81f2eae4a3b2ded1d9361d57fe8f37b5f6b1383da8d24082b9fa61

Aliases

arxiv: 2605.18206 · arxiv_version: 2605.18206v1 · doi: 10.48550/arxiv.2605.18206 · pith_short_12: SZJEROZ2QHZO · pith_short_16: SZJEROZ2QHZOVZFD · pith_short_8: SZJEROZ2

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/SZJEROZ2QHZOVZFDWLPNDWJWDV \
  | 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: 965248bb3a81f2eae4a3b2ded1d9361d57fe8f37b5f6b1383da8d24082b9fa61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c01765cca27476fd83ccba498fe9e3fcf9ea325134383aee9fe27cd8879c0e2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2026-05-18T10:45:31Z",
    "title_canon_sha256": "4398bbd5dd22d1a058baaf6bb4e7e428dd9caee076746ab1bec54f0b7bd40ec2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.18206",
    "kind": "arxiv",
    "version": 1
  }
}