Pith Number

pith:GHF435RY

pith:2020:GHF435RYKNQC3HOZJGZYS5OP4R

not attested not anchored not stored refs pending

A note on a conjecture of star chromatic index for outerplanar graphs

Qingye Yao, Xingchao Deng, Xudong Cui, Yanbing Zhang

arxiv:2006.00675 v1 · 2020-06-01 · 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{GHF435RYKNQC3HOZJGZYS5OP4R}

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	2026-07-05T01:07:04.321415Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31cbcdf63853602d9dd949b38975cfe47d307d21553a82db3a96b3680ddf0ed1

Aliases

arxiv: 2006.00675 · arxiv_version: 2006.00675v1 · doi: 10.48550/arxiv.2006.00675 · pith_short_12: GHF435RYKNQC · pith_short_16: GHF435RYKNQC3HOZ · pith_short_8: GHF435RY

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/GHF435RYKNQC3HOZJGZYS5OP4R \
  | 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: 31cbcdf63853602d9dd949b38975cfe47d307d21553a82db3a96b3680ddf0ed1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5387f6083686356efb8e2653f82cf75624f65017a1aac4fd640de741cf5b75d5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2020-06-01T02:42:19Z",
    "title_canon_sha256": "b6d36b8755e06538b1660ffdad77dd7f67105fd0fb2a8aa590fdbd1191a5842e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2006.00675",
    "kind": "arxiv",
    "version": 1
  }
}