Pith Number

pith:CNEKH4DN

pith:2013:CNEKH4DNNKXC25EX3HKTR6BHV4

not attested not anchored not stored refs pending

Blocking sets in chain geometries

Andrea Blunck, Corrado Zanella, Hans Havlicek

arxiv:1304.1340 v1 · 2013-04-04 · math.CO · math.RA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CNEKH4DNNKXC25EX3HKTR6BHV4}

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	2026-05-18T03:29:03.709622Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1348a3f06d6aae2d7497d9d538f827af0ea6c34deb4d328c19e54930c4450e3d

Aliases

arxiv: 1304.1340 · arxiv_version: 1304.1340v1 · doi: 10.48550/arxiv.1304.1340 · pith_short_12: CNEKH4DNNKXC · pith_short_16: CNEKH4DNNKXC25EX · pith_short_8: CNEKH4DN

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/CNEKH4DNNKXC25EX3HKTR6BHV4 \
  | 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: 1348a3f06d6aae2d7497d9d538f827af0ea6c34deb4d328c19e54930c4450e3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f8fd46c06ba6ffee3f8764092a18f95458ad4afb6aaed923bc9044c20d3c38b",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-04-04T12:12:16Z",
    "title_canon_sha256": "0d911daa153af323c765120cc3f40f6a549216e494b48e022eb3a29907c981f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1340",
    "kind": "arxiv",
    "version": 1
  }
}