Pith Number

pith:RIX4OCAF

pith:2018:RIX4OCAFALWBM6TWLFPQ3VS4VI

not attested not anchored not stored refs pending

Optimal designs for $K$-factor two-level models with first-order interactions on a symmetrically restricted design region

Fritjof Freise, Rainer Schwabe

arxiv:1811.12853 v2 · 2018-11-30 · 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{RIX4OCAFALWBM6TWLFPQ3VS4VI}

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	2026-05-17T23:46:29.461115Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8a2fc7080502ec167a76595f0dd65caa0156da3ccd870ffc176f165360f96acc

Aliases

arxiv: 1811.12853 · arxiv_version: 1811.12853v2 · doi: 10.48550/arxiv.1811.12853 · pith_short_12: RIX4OCAFALWB · pith_short_16: RIX4OCAFALWBM6TW · pith_short_8: RIX4OCAF

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/RIX4OCAFALWBM6TWLFPQ3VS4VI \
  | 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: 8a2fc7080502ec167a76595f0dd65caa0156da3ccd870ffc176f165360f96acc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ba1cbbe4736becdf2b3ae54ec3b9ec4f44b8d7e4dd36a1f38065de45f66842e",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2018-11-30T15:48:20Z",
    "title_canon_sha256": "8ba1f4a014a4d2345f6a5c9f89d30d74af2b96749225c1257f675c4df386531f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.12853",
    "kind": "arxiv",
    "version": 2
  }
}