Pith Number

pith:RG7JQQBV

pith:2019:RG7JQQBVWKOVJMXUOUZPNIOVI7

not attested not anchored not stored refs pending

On transversal and 2-packing numbers in uniform linear systems

Adri\'an V\'azquez-\'Avila, Carlos A. Alfaro, C. Rubio-Montiel, G. Araujo-Pardo

arxiv:1903.08984 v2 · 2019-03-19 · 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{RG7JQQBVWKOVJMXUOUZPNIOVI7}

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	2026-05-17T23:49:59.147506Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

89be984035b29d54b2f47532f6a1d547f36f689d7e375b6fccf3f30a8aee6ce7

Aliases

arxiv: 1903.08984 · arxiv_version: 1903.08984v2 · doi: 10.48550/arxiv.1903.08984 · pith_short_12: RG7JQQBVWKOV · pith_short_16: RG7JQQBVWKOVJMXU · pith_short_8: RG7JQQBV

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/RG7JQQBVWKOVJMXUOUZPNIOVI7 \
  | 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: 89be984035b29d54b2f47532f6a1d547f36f689d7e375b6fccf3f30a8aee6ce7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "502a899eb54c4b466be6d55267e31286e714869c289e547f266beff448341d42",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-03-19T18:47:56Z",
    "title_canon_sha256": "26d698f8a3fc9b67d2471adae81214112e668f1912cbf6c775ee84961895bc55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.08984",
    "kind": "arxiv",
    "version": 2
  }
}