Pith Number

pith:APVRCZI2

pith:2018:APVRCZI2RG3Z37AL543MA3X7WA

not attested not anchored not stored refs pending

DP-3-coloring of some planar graphs

Gexin Yu, Runrun Liu, Sarah Loeb, Yuxue Yin

arxiv:1802.09312 v4 · 2018-02-26 · 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{APVRCZI2RG3Z37AL543MA3X7WA}

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	2026-05-18T00:05:23.785509Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

03eb11651a89b79dfc0bef36c06effb014adf6e24d32fc013b9efe0d21379936

Aliases

arxiv: 1802.09312 · arxiv_version: 1802.09312v4 · doi: 10.48550/arxiv.1802.09312 · pith_short_12: APVRCZI2RG3Z · pith_short_16: APVRCZI2RG3Z37AL · pith_short_8: APVRCZI2

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/APVRCZI2RG3Z37AL543MA3X7WA \
  | 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: 03eb11651a89b79dfc0bef36c06effb014adf6e24d32fc013b9efe0d21379936

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df70019b0d384735fcc137df5b088df1deb86543e8a34a117c626013236f0f70",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-02-26T14:20:21Z",
    "title_canon_sha256": "5a08984c6c568633c45f1a031a74dfba52d465f92bf532794d7acf3f8bec6861"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.09312",
    "kind": "arxiv",
    "version": 4
  }
}