Pith Number

pith:D7HFGKQX

pith:2017:D7HFGKQXQA3VI7OPRYZL6D222I

not attested not anchored not stored refs pending

Distance colouring without one cycle length

Fran\c{c}ois Pirot, Ross J. Kang

arxiv:1701.07639 v1 · 2017-01-26 · 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{D7HFGKQXQA3VI7OPRYZL6D222I}

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	2026-05-17T23:59:03.821449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fce532a178037547dcf8e32bf0f5ad22d530c4475b28cbb2795e1d92cfca9a6

Aliases

arxiv: 1701.07639 · arxiv_version: 1701.07639v1 · doi: 10.48550/arxiv.1701.07639 · pith_short_12: D7HFGKQXQA3V · pith_short_16: D7HFGKQXQA3VI7OP · pith_short_8: D7HFGKQX

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/D7HFGKQXQA3VI7OPRYZL6D222I \
  | 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: 1fce532a178037547dcf8e32bf0f5ad22d530c4475b28cbb2795e1d92cfca9a6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7a3b8733da38bde656e34e4bdfc0bcd6b8104bcc16244bcb12cc7fbbe7f844f9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-01-26T10:22:46Z",
    "title_canon_sha256": "c244d2fd4f13f4287d22a62611514fec811a235ee1e8f25fadeeb05acf530c12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.07639",
    "kind": "arxiv",
    "version": 1
  }
}