Pith Number

pith:IWH6NPBL

pith:2011:IWH6NPBLJEX6F5L63KRQ2AWA3Z

not attested not anchored not stored refs pending

Independent sets in chain cacti

Jelena Sedlar

arxiv:1105.1940 v1 · 2011-05-10 · 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{IWH6NPBLJEX6F5L63KRQ2AWA3Z}

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	2026-05-18T04:22:30.252956Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

458fe6bc2b492fe2f57edaa30d02c0de6c4797700c03b122eef9718b7275d553

Aliases

arxiv: 1105.1940 · arxiv_version: 1105.1940v1 · doi: 10.48550/arxiv.1105.1940 · pith_short_12: IWH6NPBLJEX6 · pith_short_16: IWH6NPBLJEX6F5L6 · pith_short_8: IWH6NPBL

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/IWH6NPBLJEX6F5L63KRQ2AWA3Z \
  | 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: 458fe6bc2b492fe2f57edaa30d02c0de6c4797700c03b122eef9718b7275d553

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "43d9add52df521e6b339c98ae98a3794793710ca6aaab0240425cb6cb6bae587",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-05-10T13:26:42Z",
    "title_canon_sha256": "9793065aa88e54fc0ebf229da1b0705ee8d1470892e2f08d864ab48ac8749ca5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.1940",
    "kind": "arxiv",
    "version": 1
  }
}