Pith Number

pith:P7RSO5HV

pith:2014:P7RSO5HVCIIE45VHXD2YYWPFJP

not attested not anchored not stored refs pending

Tree-colorable maximal planar graphs

Enqiang Zhu, Jin Xu, Zehui Shao, Zepeng Li

arxiv:1403.5013 v1 · 2014-03-20 · 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{P7RSO5HVCIIE45VHXD2YYWPFJP}

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	2026-05-18T02:55:58.321617Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fe32774f512104e76a7b8f58c59e54bc457620bef265a5c4601464e53534a36

Aliases

arxiv: 1403.5013 · arxiv_version: 1403.5013v1 · doi: 10.48550/arxiv.1403.5013 · pith_short_12: P7RSO5HVCIIE · pith_short_16: P7RSO5HVCIIE45VH · pith_short_8: P7RSO5HV

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/P7RSO5HVCIIE45VHXD2YYWPFJP \
  | 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: 7fe32774f512104e76a7b8f58c59e54bc457620bef265a5c4601464e53534a36

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ee6fda223a425d781c5e53ab3c104da42bcafcf6055085dc615947337d884dfc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-03-20T00:57:51Z",
    "title_canon_sha256": "6887ab8d1f10c6c75e42c96a74422d841abc924a3295db672346f40dddafee58"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.5013",
    "kind": "arxiv",
    "version": 1
  }
}