Pith Number

pith:2KNXJUYG

pith:2026:2KNXJUYGSZRKCMGC3KKWRGG4Z6

not attested not anchored not stored refs pending

Star Coloring on Some Subclasses of Chordal Graphs

Ana Trujillo-Negrete, C\'esar Hern\'andez-Cruz, Cl\'audia Linhares Sales, Fernando Esteban Contreras-Mendoza, Germ\'an Ben\'itez-Bobadilla

arxiv:2606.25168 v1 · 2026-06-23 · 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{2KNXJUYGSZRKCMGC3KKWRGG4Z6}

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	2026-06-25T00:18:19.844296Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d29b74d3069662a130c2da956898dccfb227aee6f85ecdbdff0940b405f8d18d

Aliases

arxiv: 2606.25168 · arxiv_version: 2606.25168v1 · doi: 10.48550/arxiv.2606.25168 · pith_short_12: 2KNXJUYGSZRK · pith_short_16: 2KNXJUYGSZRKCMGC · pith_short_8: 2KNXJUYG

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/2KNXJUYGSZRKCMGC3KKWRGG4Z6 \
  | 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: d29b74d3069662a130c2da956898dccfb227aee6f85ecdbdff0940b405f8d18d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0470acbd09ffd1361194f8ef5bd1d283417be60a0626bd7d25b0f3f15bb47aee",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2026-06-23T21:00:28Z",
    "title_canon_sha256": "3e674e85eb5eee7cfa1fce95a5fa397bdddb375d19ac183879169433871c2f03"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.25168",
    "kind": "arxiv",
    "version": 1
  }
}