Pith Number

pith:B7GZHCPI

pith:2018:B7GZHCPI74GDXHBSERKDPZ2ZZA

not attested not anchored not stored refs pending

Classifying k-Edge Colouring for H-free Graphs

Bernard Ries, Daniel Paulusma, Esther Galby, Paloma T. Lima

arxiv:1810.04379 v1 · 2018-10-10 · cs.DS · cs.CC · 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{B7GZHCPI74GDXHBSERKDPZ2ZZA}

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	2026-05-18T00:03:40.304367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fcd9389e8ff0c3b9c32245437e759c83ec9fddb5a0e01f3ac314896f8a0ba2f

Aliases

arxiv: 1810.04379 · arxiv_version: 1810.04379v1 · doi: 10.48550/arxiv.1810.04379 · pith_short_12: B7GZHCPI74GD · pith_short_16: B7GZHCPI74GDXHBS · pith_short_8: B7GZHCPI

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/B7GZHCPI74GDXHBSERKDPZ2ZZA \
  | 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: 0fcd9389e8ff0c3b9c32245437e759c83ec9fddb5a0e01f3ac314896f8a0ba2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8baa0c01806ce4aee017557a6816bf702ed9e63d64872db933053fb48489d04e",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-10-10T06:03:12Z",
    "title_canon_sha256": "4ffd72128c32f527f90288d077500e0832d4841444fcdb4d9e6983c6f30579f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.04379",
    "kind": "arxiv",
    "version": 1
  }
}