Pith Number

pith:IN6KODBK

pith:2011:IN6KODBKF6FQE7REK772TTCJRK

not attested not anchored not stored refs pending

New results on D-optimal Matrices

Dragomir Z. Djokovic, Ilias S. Kotsireas

arxiv:1103.3626 v2 · 2011-03-18 · 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{IN6KODBKF6FQE7REK772TTCJRK}

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	2026-05-18T03:36:05.038142Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

437ca70c2a2f8b027e2457ffa9cc498aaceb09ac2420df471b5f676a6d93d244

Aliases

arxiv: 1103.3626 · arxiv_version: 1103.3626v2 · doi: 10.48550/arxiv.1103.3626 · pith_short_12: IN6KODBKF6FQ · pith_short_16: IN6KODBKF6FQE7RE · pith_short_8: IN6KODBK

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/IN6KODBKF6FQE7REK772TTCJRK \
  | 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: 437ca70c2a2f8b027e2457ffa9cc498aaceb09ac2420df471b5f676a6d93d244

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55ea44b62fe25089a9e8a76b594b68aa90bc1416bd653e5fc83adabfc6d225c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-03-18T13:47:43Z",
    "title_canon_sha256": "b8f0205e510f69a7a3237b4254a06bc9d6c820e2ea12e93c8f7dde05d9b2a4be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.3626",
    "kind": "arxiv",
    "version": 2
  }
}