Pith Number

pith:77WIERRQ

pith:2011:77WIERRQZ6VCGLARE4Y5XDVQ2T

not attested not anchored not stored refs pending

Helly numbers of acyclic families

\'Eric Colin de Verdi\`ere, Gr\'egory Ginot, Xavier Goaoc

arxiv:1101.6006 v2 · 2011-01-31 · math.CO · cs.CG · cs.DM · math.AT · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{77WIERRQZ6VCGLARE4Y5XDVQ2T}

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	2026-05-18T04:27:57.807705Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ffec824630cfaa232c112731db8eb0d4d55a40e1ff29c3a8d1eb2d5d78e0c138

Aliases

arxiv: 1101.6006 · arxiv_version: 1101.6006v2 · doi: 10.48550/arxiv.1101.6006 · pith_short_12: 77WIERRQZ6VC · pith_short_16: 77WIERRQZ6VCGLAR · pith_short_8: 77WIERRQ

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/77WIERRQZ6VCGLARE4Y5XDVQ2T \
  | 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: ffec824630cfaa232c112731db8eb0d4d55a40e1ff29c3a8d1eb2d5d78e0c138

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a96cbea9aee00c18e2cabcd7c45f248fc7db0543d6e5036c716aed85f41fa08",
    "cross_cats_sorted": [
      "cs.CG",
      "cs.DM",
      "math.AT",
      "math.MG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-01-31T16:21:38Z",
    "title_canon_sha256": "327af055bc1ba250f3d14156245dd7e36c0540a2e7938922526383a4458b5b0d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.6006",
    "kind": "arxiv",
    "version": 2
  }
}