Pith Number

pith:6Q3IR5QJ

pith:2019:6Q3IR5QJ34SVUVYVOOGTG6NA3T

not attested not anchored not stored refs pending

The game chromatic index of trees of maximum degree 4 with at most three degree-four vertices in a row

Wai Hong Chan, Wai Lam Fong

arxiv:1904.01496 v1 · 2019-04-02 · 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{6Q3IR5QJ34SVUVYVOOGTG6NA3T}

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	2026-05-17T23:49:34.499850Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f43688f609df255a5715738d3379a0dcfa6ffa64a431e599c28077d52b6dc714

Aliases

arxiv: 1904.01496 · arxiv_version: 1904.01496v1 · doi: 10.48550/arxiv.1904.01496 · pith_short_12: 6Q3IR5QJ34SV · pith_short_16: 6Q3IR5QJ34SVUVYV · pith_short_8: 6Q3IR5QJ

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/6Q3IR5QJ34SVUVYVOOGTG6NA3T \
  | 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: f43688f609df255a5715738d3379a0dcfa6ffa64a431e599c28077d52b6dc714

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29764c3760c987f97617492175553c690a6b2c8fe665bc480c8f9a4b0f0e81f5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-04-02T15:33:48Z",
    "title_canon_sha256": "9ecdc4c6456127fd2e5603fb38ea2a920c8a4dffa0f18bc7ee04c6a3855b9e2c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.01496",
    "kind": "arxiv",
    "version": 1
  }
}