Pith Number

pith:DCQ2WZZA

pith:2019:DCQ2WZZAMI6RRAFZLHLDD3Y5MY

not attested not anchored not stored refs pending

Chromatic Polynomial and Heaps of Pieces

Bishal Deb

arxiv:1902.02240 v2 · 2019-02-06 · 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{DCQ2WZZAMI6RRAFZLHLDD3Y5MY}

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.

Cited by

1 paper in Pith

Generalized chromatic polynomials of graphs from Heaps of pieces

Receipt and verification

First computed	2026-05-17T23:51:09.334000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

18a1ab6720623d1880b959d631ef1d6611857d47201232bb77957c4cdfce153b

Aliases

arxiv: 1902.02240 · arxiv_version: 1902.02240v2 · doi: 10.48550/arxiv.1902.02240 · pith_short_12: DCQ2WZZAMI6R · pith_short_16: DCQ2WZZAMI6RRAFZ · pith_short_8: DCQ2WZZA

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/DCQ2WZZAMI6RRAFZLHLDD3Y5MY \
  | 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: 18a1ab6720623d1880b959d631ef1d6611857d47201232bb77957c4cdfce153b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e37487c0693ee0bf3fc1860d1f7f2b760bd608d9af19d1d59b4e201d20a6819e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-02-06T15:42:53Z",
    "title_canon_sha256": "1b277a854448259a1825abfc39b97f0de465fbc5b73098d50eb0990bd8538d56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.02240",
    "kind": "arxiv",
    "version": 2
  }
}