Pith Number

pith:C6PTL3L3

pith:2013:C6PTL3L3TFEDSWGBWH5QGWNBQP

not attested not anchored not stored refs pending

Extremal Hypergraphs for Ryser's Conjecture: Connectedness of Line Graphs of Bipartite Graphs

Lothar Narins, Penny Haxell, Tibor Szab\'o

arxiv:1401.0169 v3 · 2013-12-31 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C6PTL3L3TFEDSWGBWH5QGWNBQP}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:12:18.882017Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

179f35ed7b99483958c1b1fb0359a183ee1771fb5b81397f678eef87c4580cfa

Aliases

arxiv: 1401.0169 · arxiv_version: 1401.0169v3 · doi: 10.48550/arxiv.1401.0169 · pith_short_12: C6PTL3L3TFED · pith_short_16: C6PTL3L3TFEDSWGB · pith_short_8: C6PTL3L3

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/C6PTL3L3TFEDSWGBWH5QGWNBQP \
  | 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: 179f35ed7b99483958c1b1fb0359a183ee1771fb5b81397f678eef87c4580cfa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aabdd53204f096802d71860fd511eefe90ebe258eb8b4425a1781cdde3f7e334",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-12-31T16:23:21Z",
    "title_canon_sha256": "8cb446506ca88167ddab15d92b84b416d048e40f9f51cbd49766b2f71318af49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.0169",
    "kind": "arxiv",
    "version": 3
  }
}