Pith Number

pith:L7SZIDUN

pith:2013:L7SZIDUNE4RR2XGFYEJ4CFJ3D6

not attested not anchored not stored refs pending

Some new orders of Hadamard and skew-Hadamard matrices

Dragomir Z. Djokovic, Ilias S. Kotsireas, Oleg Golubitsky

arxiv:1301.3671 v2 · 2013-01-16 · 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{L7SZIDUNE4RR2XGFYEJ4CFJ3D6}

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	2026-05-18T02:49:54.208545Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5fe5940e8d27231d5cc5c113c1153b1fa17a8e4182af971071568a093f571df5

Aliases

arxiv: 1301.3671 · arxiv_version: 1301.3671v2 · doi: 10.48550/arxiv.1301.3671 · pith_short_12: L7SZIDUNE4RR · pith_short_16: L7SZIDUNE4RR2XGF · pith_short_8: L7SZIDUN

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/L7SZIDUNE4RR2XGFYEJ4CFJ3D6 \
  | 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: 5fe5940e8d27231d5cc5c113c1153b1fa17a8e4182af971071568a093f571df5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bbfd154a786df12439935cfb7c9a2c355a2f60e43f80f9e8ba6548005c1e67dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-01-16T12:26:19Z",
    "title_canon_sha256": "b3a0f508c40f83249d23df8fa4701ba128f1dc65fb7b225c28cc1c628279c5dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.3671",
    "kind": "arxiv",
    "version": 2
  }
}