Pith Number

pith:6YMXGCQG

pith:2018:6YMXGCQGZ7JK5WXOIHVOGT5PPG

not attested not anchored not stored refs pending

Optimal designs for two-level main effects models on a restricted design region

Fritjof Freise, Heinz Holling, Rainer Schwabe

arxiv:1808.06901 v2 · 2018-08-21 · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6YMXGCQGZ7JK5WXOIHVOGT5PPG}

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	2026-05-17T23:41:25.026118Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f619730a06cfd2aedaee41eae34faf79a1fa7821a2c0129229ceff6588d95094

Aliases

arxiv: 1808.06901 · arxiv_version: 1808.06901v2 · doi: 10.48550/arxiv.1808.06901 · pith_short_12: 6YMXGCQGZ7JK · pith_short_16: 6YMXGCQGZ7JK5WXO · pith_short_8: 6YMXGCQG

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/6YMXGCQGZ7JK5WXOIHVOGT5PPG \
  | 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: f619730a06cfd2aedaee41eae34faf79a1fa7821a2c0129229ceff6588d95094

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fddf1c210658e7bb9fc74689ea91d01a88b94939d0d9eabfa89a80b2e46a368d",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2018-08-21T13:59:06Z",
    "title_canon_sha256": "519a7868154f264358e17ca0b88890bb7ef61b38eae11e4ed1e54493aae4f9fb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.06901",
    "kind": "arxiv",
    "version": 2
  }
}