Pith Number

pith:QY53LW4H

pith:2017:QY53LW4HZBDZSSLSXVGT4RKCSK

not attested not anchored not stored refs pending

The Painter's Problem: covering a grid with colored connected polygons

Arthur van Goethem, Irina Kostitsyna, Jules Wulms, Marc van Kreveld, Max Sondag, Wouter Meulemans

arxiv:1709.00001 v1 · 2017-08-30 · cs.CG · 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{QY53LW4HZBDZSSLSXVGT4RKCSK}

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	2026-05-18T00:36:13.668608Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

863bb5db87c847994972bd4d3e4542929deebe517c3cfc9b9f99ddac3174e026

Aliases

arxiv: 1709.00001 · arxiv_version: 1709.00001v1 · doi: 10.48550/arxiv.1709.00001 · pith_short_12: QY53LW4HZBDZ · pith_short_16: QY53LW4HZBDZSSLS · pith_short_8: QY53LW4H

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/QY53LW4HZBDZSSLSXVGT4RKCSK \
  | 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: 863bb5db87c847994972bd4d3e4542929deebe517c3cfc9b9f99ddac3174e026

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e7d8d3a1aa0e7f3f921b03fb83806dd1d3d243f92414a84e16c054d434642e8e",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2017-08-30T19:19:04Z",
    "title_canon_sha256": "6430f236b882c86d67231b9d8b45d9a2bbf7f74bc6b7d108d84472dfbf2aaef3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.00001",
    "kind": "arxiv",
    "version": 1
  }
}