Pith Number

pith:NQEMRABH

pith:2018:NQEMRABHKZLVOOOGY7BOO5QAY3

not attested not anchored not stored refs pending

Tree-like distance colouring for planar graphs of sufficient girth

Ross J. Kang, Willem van Loon

arxiv:1805.02156 v2 · 2018-05-06 · math.CO · cs.DM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NQEMRABHKZLVOOOGY7BOO5QAY3}

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	2026-05-17T23:54:39.604499Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c08c8802756575739c6c7c2e77600c6cd62f6079aa6b01d2d77669fcf13247f

Aliases

arxiv: 1805.02156 · arxiv_version: 1805.02156v2 · doi: 10.48550/arxiv.1805.02156 · pith_short_12: NQEMRABHKZLV · pith_short_16: NQEMRABHKZLVOOOG · pith_short_8: NQEMRABH

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/NQEMRABHKZLVOOOGY7BOO5QAY3 \
  | 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: 6c08c8802756575739c6c7c2e77600c6cd62f6079aa6b01d2d77669fcf13247f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22743ddc7c9914857e19764cf01547f53e91d69cedff2197cc5eb010a90d7b14",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-05-06T06:19:40Z",
    "title_canon_sha256": "dbef431df7c79319e3f23633cbc23303606c38ae0a065a8960887db1f1b99315"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.02156",
    "kind": "arxiv",
    "version": 2
  }
}