Pith Number

pith:QZVU26VJ

pith:2018:QZVU26VJQDTR46ATISGRILV5TN

not attested not anchored not stored refs pending

Packing colouring of some classes of cubic graphs

Daouya La\"iche (L'IFORCE), Eric Sopena (LaBRI)

arxiv:1808.02675 v2 · 2018-08-08 · 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{QZVU26VJQDTR46ATISGRILV5TN}

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	2026-05-18T00:08:14.245277Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

866b4d7aa980e71e7813448d142ebd9b6b0f10540a942a29a83c5ead10c73079

Aliases

arxiv: 1808.02675 · arxiv_version: 1808.02675v2 · doi: 10.48550/arxiv.1808.02675 · pith_short_12: QZVU26VJQDTR · pith_short_16: QZVU26VJQDTR46AT · pith_short_8: QZVU26VJ

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/QZVU26VJQDTR46ATISGRILV5TN \
  | 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: 866b4d7aa980e71e7813448d142ebd9b6b0f10540a942a29a83c5ead10c73079

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1809b6a1dcbf89511be928e6d2b6ba11b69cebac8355cf3e643bb342392d5885",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2018-08-08T08:59:55Z",
    "title_canon_sha256": "d83704bc1c84a87c1423c1456ea80b947ee7b7860d36f37819916b7dd75eef9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.02675",
    "kind": "arxiv",
    "version": 2
  }
}