Pith Number

pith:PTLT744K

pith:2018:PTLT744KFQO5H5OW2D2WDLL22T

not attested not anchored not stored refs pending

On the Smith normal form of a skew-symmetric D-optimal design of order $n\equiv 2\pmod{4}$

Gary Greaves, Sho Suda

arxiv:1801.07516 v2 · 2018-01-23 · 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{PTLT744KFQO5H5OW2D2WDLL22T}

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	2026-05-18T00:16:44.323768Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7cd73ff38a2c1dd3f5d6d0f561ad7ad4ead0db561c667f0eb4ec65e7ea8e67f9

Aliases

arxiv: 1801.07516 · arxiv_version: 1801.07516v2 · doi: 10.48550/arxiv.1801.07516 · pith_short_12: PTLT744KFQO5 · pith_short_16: PTLT744KFQO5H5OW · pith_short_8: PTLT744K

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/PTLT744KFQO5H5OW2D2WDLL22T \
  | 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: 7cd73ff38a2c1dd3f5d6d0f561ad7ad4ead0db561c667f0eb4ec65e7ea8e67f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfdc940c2b5ccb2b13c68a14e7fdfe16fe86ace192e2fdd38dffaa13e7dff791",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-01-23T12:48:47Z",
    "title_canon_sha256": "cab281da47f2e85c415e123756fc810f1d847ce8937d214e4a20484ba7bfa485"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.07516",
    "kind": "arxiv",
    "version": 2
  }
}