Pith Number

pith:RWRBDQKB

pith:2013:RWRBDQKBNHYUPZJRMJD6GRYJEG

not attested not anchored not stored refs pending

Constructing Ordered Orthogonal Arrays via Sudoku

John Lorch

arxiv:1309.1680 v2 · 2013-09-06 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RWRBDQKBNHYUPZJRMJD6GRYJEG}

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	2026-05-18T02:30:55.165576Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8da211c14169f147e5316247e3470921ba40b5ba4cf205db9e1bdae293d13928

Aliases

arxiv: 1309.1680 · arxiv_version: 1309.1680v2 · doi: 10.48550/arxiv.1309.1680 · pith_short_12: RWRBDQKBNHYU · pith_short_16: RWRBDQKBNHYUPZJR · pith_short_8: RWRBDQKB

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/RWRBDQKBNHYUPZJRMJD6GRYJEG \
  | 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: 8da211c14169f147e5316247e3470921ba40b5ba4cf205db9e1bdae293d13928

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da7baf000e02401537618d32592f8424428183bd56474c06fefff407779eb728",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-09-06T15:49:22Z",
    "title_canon_sha256": "16b653c84bac538c465dc4723c14c8f130807945fc4abdfb4d5208f334f103d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.1680",
    "kind": "arxiv",
    "version": 2
  }
}