Pith Number

pith:XSFKBYLL

pith:2013:XSFKBYLL3LHJF6H3KYT6YPBO7Y

not attested not anchored not stored refs pending

The 3-way intersection problem for S(2, 4, v) designs

Nasrin Soltankhah, Saeedeh Rashidi

arxiv:1301.4764 v1 · 2013-01-21 · 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{XSFKBYLL3LHJF6H3KYT6YPBO7Y}

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	2026-05-18T03:35:55.716852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc8aa0e16bdace92f8fb5627ec3c2efe3495cc9bef5dace94977abe6b20411a0

Aliases

arxiv: 1301.4764 · arxiv_version: 1301.4764v1 · doi: 10.48550/arxiv.1301.4764 · pith_short_12: XSFKBYLL3LHJ · pith_short_16: XSFKBYLL3LHJF6H3 · pith_short_8: XSFKBYLL

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/XSFKBYLL3LHJF6H3KYT6YPBO7Y \
  | 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: bc8aa0e16bdace92f8fb5627ec3c2efe3495cc9bef5dace94977abe6b20411a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "929a1868fc9c28489f031473aa2f8fe5161375a1700f6906cb4439c0ab3c9209",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-01-21T06:36:46Z",
    "title_canon_sha256": "b9b1bd531bd925ab3935423e4e093155f2a5f3306ccdced1a3de13b2e7acf913"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.4764",
    "kind": "arxiv",
    "version": 1
  }
}