Pith Number

pith:63YM5XS3

pith:2009:63YM5XS3ZZQ27MCZOEUHPJN3RS

not attested not anchored not stored refs pending

Steiner quadruple systems with point-regular abelian automorphism groups

Akihiro Munemasa, Masanori Sawa

arxiv:0910.2759 v4 · 2009-10-15 · 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{63YM5XS3ZZQ27MCZOEUHPJN3RS}

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	2026-05-18T00:32:31.853515Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6f0cede5bce61afb059712877a5bb8c90a5bf1f76fbbcec7c8ad998f05a3224

Aliases

arxiv: 0910.2759 · arxiv_version: 0910.2759v4 · doi: 10.48550/arxiv.0910.2759 · pith_short_12: 63YM5XS3ZZQ2 · pith_short_16: 63YM5XS3ZZQ27MCZ · pith_short_8: 63YM5XS3

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/63YM5XS3ZZQ27MCZOEUHPJN3RS \
  | 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: f6f0cede5bce61afb059712877a5bb8c90a5bf1f76fbbcec7c8ad998f05a3224

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "022bc0a824f27999d3b1003c6f50616e258d4080106bede2f5adbc7c0aa1aafb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-10-15T01:47:00Z",
    "title_canon_sha256": "f7c665ea7028adfdfb1f492f9659602ab311f6a46b7a8b257f063bbc275a87b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.2759",
    "kind": "arxiv",
    "version": 4
  }
}