Pith Number

pith:EO3YZEMR

pith:2014:EO3YZEMRVPXUV3Z6YOKBJUIYG3

not attested not anchored not stored refs pending

Strong edge-colouring of sparse planar graphs

Ararat Harutyunyan (MI), Herv\'e Hocquard (LaBRI), Julien Bensmail (LaBRI), Petru Valicov (LIP)

arxiv:1401.4568 v3 · 2014-01-18 · 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{EO3YZEMRVPXUV3Z6YOKBJUIYG3}

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.

Cited by

1 paper in Pith

Coloring, List Coloring, and Painting Squares of Graphs (and other related problems)

Receipt and verification

First computed	2026-05-18T02:47:15.702807Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23b78c9191abef4aef3ec39414d11836f1bfa92de16f242810afdb89e0e9a8a6

Aliases

arxiv: 1401.4568 · arxiv_version: 1401.4568v3 · doi: 10.48550/arxiv.1401.4568 · pith_short_12: EO3YZEMRVPXU · pith_short_16: EO3YZEMRVPXUV3Z6 · pith_short_8: EO3YZEMR

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/EO3YZEMRVPXUV3Z6YOKBJUIYG3 \
  | 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: 23b78c9191abef4aef3ec39414d11836f1bfa92de16f242810afdb89e0e9a8a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b122824c3a38d4440fa21418ad0c99effe5d777c224fa2a15ce921f6189c28a",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2014-01-18T17:11:56Z",
    "title_canon_sha256": "099e3538dce21c43a33c2aced8101a59d27c57d24f1220b38621ebdb01c1dbc3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.4568",
    "kind": "arxiv",
    "version": 3
  }
}