Pith Number

pith:5LBAKT2Z

pith:2011:5LBAKT2ZTHXXUKZ4NCVRO5CV54

not attested not anchored not stored refs pending

Colouring the Triangles Determined by a Point Set

David R. Wood, Ruy Fabila-Monroy

arxiv:1109.3218 v2 · 2011-09-14 · math.CO · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5LBAKT2ZTHXXUKZ4NCVRO5CV54}

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	2026-05-18T03:20:57.080255Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eac2054f5999ef7a2b3c68ab177455ef10c1f0bac67114561214f07ddbe3938f

Aliases

arxiv: 1109.3218 · arxiv_version: 1109.3218v2 · doi: 10.48550/arxiv.1109.3218 · pith_short_12: 5LBAKT2ZTHXX · pith_short_16: 5LBAKT2ZTHXXUKZ4 · pith_short_8: 5LBAKT2Z

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/5LBAKT2ZTHXXUKZ4NCVRO5CV54 \
  | 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: eac2054f5999ef7a2b3c68ab177455ef10c1f0bac67114561214f07ddbe3938f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26c1e48b91fee31b62f9b4f83f82d52e7381b6288cb4086e3517289cd87550a3",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-09-14T22:10:21Z",
    "title_canon_sha256": "642e0b9981692d650b9dad78df03e1692f570de866de9d30e7cf6b59d61e150c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.3218",
    "kind": "arxiv",
    "version": 2
  }
}