Pith Number

pith:XJNDVDY7

pith:2018:XJNDVDY7OFT2PVRDHBYOLF6X7S

not attested not anchored not stored refs pending

Non-intersecting Ryser hypergraphs

Anurag Bishnoi, Valentina Pepe

arxiv:1809.06931 v3 · 2018-09-18 · 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{XJNDVDY7OFT2PVRDHBYOLF6X7S}

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	2026-07-05T00:15:21.985080Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba5a3a8f1f7167a7d6233870e597d7fcabd488532a83b3bb0d2eec06c701389c

Aliases

arxiv: 1809.06931 · arxiv_version: 1809.06931v3 · doi: 10.48550/arxiv.1809.06931 · pith_short_12: XJNDVDY7OFT2 · pith_short_16: XJNDVDY7OFT2PVRD · pith_short_8: XJNDVDY7

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/XJNDVDY7OFT2PVRDHBYOLF6X7S \
  | 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: ba5a3a8f1f7167a7d6233870e597d7fcabd488532a83b3bb0d2eec06c701389c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c181ce4a1a7fc198dbfa947151b96352c82b06ad4f4bfea6acaa91e23505b7a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-09-18T20:52:06Z",
    "title_canon_sha256": "0d7a78b0ffb7aced5325e089213ae5427b7fc15d973cfea70b8439c78901e1b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.06931",
    "kind": "arxiv",
    "version": 3
  }
}