Pith Number

pith:LKQWHHFB

pith:2017:LKQWHHFB7R6J6OYCHVQ2BLBLBY

not attested not anchored not stored refs pending

Construction and nonexistence of strong external difference families

Jonathan Jedwab, Shuxing Li

arxiv:1701.05705 v3 · 2017-01-20 · 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{LKQWHHFB7R6J6OYCHVQ2BLBLBY}

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	2026-05-18T00:30:28.545118Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5aa1639ca1fc7c9f3b023d61a0ac2b0e18f025de909e8a4387936ca270095bcc

Aliases

arxiv: 1701.05705 · arxiv_version: 1701.05705v3 · doi: 10.48550/arxiv.1701.05705 · pith_short_12: LKQWHHFB7R6J · pith_short_16: LKQWHHFB7R6J6OYC · pith_short_8: LKQWHHFB

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/LKQWHHFB7R6J6OYCHVQ2BLBLBY \
  | 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: 5aa1639ca1fc7c9f3b023d61a0ac2b0e18f025de909e8a4387936ca270095bcc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36eb34ab571996ffc5488d9ab99ad2f757f757f7564485095a70f547012c7b42",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-01-20T07:04:16Z",
    "title_canon_sha256": "75b25a747921c8ecf6ceeaa332db139cf33d1f0c8125ce7eb17ad8c0fc168523"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.05705",
    "kind": "arxiv",
    "version": 3
  }
}