Pith Number

pith:ZW575KC2

pith:2011:ZW575KC24I4AMGYIYF4MEE6D7K

not attested not anchored not stored refs pending

A Problem Concerning Nonincident Points and Blocks in Steiner Triple Systems

Douglas R. Stinson

arxiv:1109.3847 v1 · 2011-09-18 · 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{ZW575KC24I4AMGYIYF4MEE6D7K}

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	2026-05-18T04:12:45.754123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdbbfea85ae238061b08c178c213c3faa33d73107ae37c9d82a0a900b7e70392

Aliases

arxiv: 1109.3847 · arxiv_version: 1109.3847v1 · doi: 10.48550/arxiv.1109.3847 · pith_short_12: ZW575KC24I4A · pith_short_16: ZW575KC24I4AMGYI · pith_short_8: ZW575KC2

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/ZW575KC24I4AMGYIYF4MEE6D7K \
  | 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: cdbbfea85ae238061b08c178c213c3faa33d73107ae37c9d82a0a900b7e70392

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30645f6864dddcd094c266788a92a98f40d8617f55be46d9d04aa3fba2227e7d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-09-18T06:20:18Z",
    "title_canon_sha256": "a8bc9ae9154c99a44a9c664f3e780022b56af7c4bfca9a905831430dfcf670cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.3847",
    "kind": "arxiv",
    "version": 1
  }
}