Pith Number

pith:4LRCEKNR

pith:2009:4LRCEKNR7C5KVA44VLTC3HQWWK

not attested not anchored not stored refs pending

On combinatorial testing problems

G\'abor Lugosi, Louigi Addario-Berry, Luc Devroye, Nicolas Broutin

arxiv:0908.3437 v2 · 2009-08-24 · math.ST · math.CO · 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{4LRCEKNR7C5KVA44VLTC3HQWWK}

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	2026-05-18T04:35:14.975123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2e22229b1f8baaa839caae62d9e16b2aba79a24bbe655004d212ea07bfc12ff

Aliases

arxiv: 0908.3437 · arxiv_version: 0908.3437v2 · doi: 10.48550/arxiv.0908.3437 · pith_short_12: 4LRCEKNR7C5K · pith_short_16: 4LRCEKNR7C5KVA44 · pith_short_8: 4LRCEKNR

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/4LRCEKNR7C5KVA44VLTC3HQWWK \
  | 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: e2e22229b1f8baaa839caae62d9e16b2aba79a24bbe655004d212ea07bfc12ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfb3ed13833d961e35a520de629d62494469b57ecd11e214a1e42226de836d47",
    "cross_cats_sorted": [
      "math.CO",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2009-08-24T13:24:47Z",
    "title_canon_sha256": "66323c4b6b159b8dccd8938dcd7ad79672adee292933a17d729daeb3465e38f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3437",
    "kind": "arxiv",
    "version": 2
  }
}