Pith Number

pith:3Q74AQXS

pith:2025:3Q74AQXSUEPCAFLJJ4ADRA5WKF

not attested not anchored not stored refs pending

Backbone colouring of chordal graphs

J\'ulio Ara\'ujo, Lucas Picasarri-Arrieta, Nicolas Nisse

arxiv:2508.02980 v1 · 2025-08-05 · math.CO · cs.DM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3Q74AQXSUEPCAFLJJ4ADRA5WKF}

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	2026-07-05T11:48:34.025957Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc3fc042f2a11e2015694f003883b651478591937de0a95a798e81e7c09797e8

Aliases

arxiv: 2508.02980 · arxiv_version: 2508.02980v1 · doi: 10.48550/arxiv.2508.02980 · pith_short_12: 3Q74AQXSUEPC · pith_short_16: 3Q74AQXSUEPCAFLJ · pith_short_8: 3Q74AQXS

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/3Q74AQXSUEPCAFLJJ4ADRA5WKF \
  | 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: dc3fc042f2a11e2015694f003883b651478591937de0a95a798e81e7c09797e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f5ab00b86bc6e2742f92fc37848d76a2a8e8ea3f4b46877fcce49ed65abb158",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2025-08-05T01:11:58Z",
    "title_canon_sha256": "6a7628a56eadc793e097bf1ac7914e8e0b25bf395965b0d3d6be450012b5be2b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.02980",
    "kind": "arxiv",
    "version": 1
  }
}