Pith Number

pith:H7OAIBCZ

pith:2019:H7OAIBCZ65VQ3TD7QQECCOG4U5

not attested not anchored not stored refs pending

New necessary conditions for (negative) Latin square type partial difference sets in abelian groups

Zeying Wang

arxiv:1905.03730 v1 · 2019-05-09 · 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{H7OAIBCZ65VQ3TD7QQECCOG4U5}

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	2026-05-17T23:46:36.824618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3fdc040459f76b0dcc7f84082138dca776f8f253c25479f2eb7610a1e7d9df75

Aliases

arxiv: 1905.03730 · arxiv_version: 1905.03730v1 · doi: 10.48550/arxiv.1905.03730 · pith_short_12: H7OAIBCZ65VQ · pith_short_16: H7OAIBCZ65VQ3TD7 · pith_short_8: H7OAIBCZ

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/H7OAIBCZ65VQ3TD7QQECCOG4U5 \
  | 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: 3fdc040459f76b0dcc7f84082138dca776f8f253c25479f2eb7610a1e7d9df75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef3e2782fbc9a4f96d13b92a55aeee92e2d15c93100d05356e3b0d203a8f26a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-05-09T16:13:00Z",
    "title_canon_sha256": "3e76c4985a533d514add4668404c793aad7f80977dc03472168ec78d1c2acbf6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.03730",
    "kind": "arxiv",
    "version": 1
  }
}