Pith Number

pith:VB77KDC6

pith:2018:VB77KDC6NJZJASWJHIHQALBLZL

not attested not anchored not stored refs pending

Characterization of forbidden subgraphs for bounded star chromatic number

Boram Park, Ilkyoo Choi, Ringi Kim

arxiv:1812.01279 v1 · 2018-12-04 · 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{VB77KDC6NJZJASWJHIHQALBLZL}

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	2026-05-17T23:59:12.894064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a87ff50c5e6a72904ac93a0f002c2bcac1bde10ad81abf162bbf96fdf6da9e1c

Aliases

arxiv: 1812.01279 · arxiv_version: 1812.01279v1 · doi: 10.48550/arxiv.1812.01279 · pith_short_12: VB77KDC6NJZJ · pith_short_16: VB77KDC6NJZJASWJ · pith_short_8: VB77KDC6

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/VB77KDC6NJZJASWJHIHQALBLZL \
  | 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: a87ff50c5e6a72904ac93a0f002c2bcac1bde10ad81abf162bbf96fdf6da9e1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c53e071449fb326ccd13248473b17d97c1bd3b5e5a7c15f574e33ba7cf2a4b04",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-12-04T08:49:38Z",
    "title_canon_sha256": "2b153253c5e922b40c1577e2ef90e0f0b8c7ad98f5b50df80bc59a320b9561ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.01279",
    "kind": "arxiv",
    "version": 1
  }
}