Pith Number

pith:FRSC6HHK

pith:2013:FRSC6HHKOLUGDPTA4AS7AHEECA

not attested not anchored not stored refs pending

Hamiltonian chordal graphs are not cycle extendible

Ben Seamone, Manuel Lafond

arxiv:1311.5863 v2 · 2013-11-22 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FRSC6HHKOLUGDPTA4AS7AHEECA}

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	2026-05-18T02:32:14.309925Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c642f1cea72e861be60e025f01c84101faa29ccaaed7762bd338a7ef1c37380

Aliases

arxiv: 1311.5863 · arxiv_version: 1311.5863v2 · doi: 10.48550/arxiv.1311.5863 · pith_short_12: FRSC6HHKOLUG · pith_short_16: FRSC6HHKOLUGDPTA · pith_short_8: FRSC6HHK

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/FRSC6HHKOLUGDPTA4AS7AHEECA \
  | 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: 2c642f1cea72e861be60e025f01c84101faa29ccaaed7762bd338a7ef1c37380

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b701de7c290b42f040aa868e12605ea8302c896f39cad5159ddd65cb19e944d",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-11-22T20:10:15Z",
    "title_canon_sha256": "9366cbeea609e47ebca5d114808be51a641a29d3436c086d125e1b266cdae403"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.5863",
    "kind": "arxiv",
    "version": 2
  }
}