Pith Number

pith:AEYPR4QC

pith:2013:AEYPR4QCUSW4RBW6EK4RZBOWQL

not attested not anchored not stored refs pending

Optimal Combinatorial Batch Codes based on Block Designs

Anna G\'al, Natalia Silberstein

arxiv:1312.5505 v2 · 2013-12-19 · cs.DM · 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{AEYPR4QCUSW4RBW6EK4RZBOWQL}

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	2026-05-18T02:37:58.856098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0130f8f202a4adc886de22b91c85d682f05f596771b37ce702698b80bc0b7d93

Aliases

arxiv: 1312.5505 · arxiv_version: 1312.5505v2 · doi: 10.48550/arxiv.1312.5505 · pith_short_12: AEYPR4QCUSW4 · pith_short_16: AEYPR4QCUSW4RBW6 · pith_short_8: AEYPR4QC

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/AEYPR4QCUSW4RBW6EK4RZBOWQL \
  | 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: 0130f8f202a4adc886de22b91c85d682f05f596771b37ce702698b80bc0b7d93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24314ea3613b1d42e72f3702d5f280c4dec5554bce1a25eb8451f244b3bafb34",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2013-12-19T12:26:14Z",
    "title_canon_sha256": "61514bfda48e4c5470bc5091358bc12cba375c703a6b9aae1b331e701dc3cabf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.5505",
    "kind": "arxiv",
    "version": 2
  }
}