Pith Number

pith:6K2HKZGY

pith:2018:6K2HKZGYSKNKN237GJFTISWGKS

not attested not anchored not stored refs pending

Coloring even-hole-free graphs with no star cutset

Ngoc Khang Le

arxiv:1805.01948 v1 · 2018-05-04 · cs.DM · 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{6K2HKZGYSKNKN237GJFTISWGKS}

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	2026-05-18T00:13:59.839036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2b47564d8929aa6eb7f324b344ac654a7a5f89bd2f278b524075167110b90f5

Aliases

arxiv: 1805.01948 · arxiv_version: 1805.01948v1 · doi: 10.48550/arxiv.1805.01948 · pith_short_12: 6K2HKZGYSKNK · pith_short_16: 6K2HKZGYSKNKN237 · pith_short_8: 6K2HKZGY

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/6K2HKZGYSKNKN237GJFTISWGKS \
  | 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: f2b47564d8929aa6eb7f324b344ac654a7a5f89bd2f278b524075167110b90f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "975b9efd217b025aca21f17506311b586ee1f7047dbaca203727cc7938f57ad3",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2018-05-04T22:15:03Z",
    "title_canon_sha256": "1023118823cbcf15189fd2cc2afc86b808e957df807fdeb9e42b7454c07976b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.01948",
    "kind": "arxiv",
    "version": 1
  }
}