Pith Number

pith:3IO5WFKO

pith:2006:3IO5WFKOFGKY4LOJM46WGK4C2M

not attested not anchored not stored refs pending

3-facial colouring of plane graphs

F\'ed\'eric Havet (INRIA Sophia Antipolis), Jean-S\'ebastien Sereni (INRIA Sophia Antipolis), Riste Skrekovski

arxiv:cs/0607008 v1 · 2006-07-03 · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3IO5WFKOFGKY4LOJM46WGK4C2M}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T01:08:54.600248Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da1ddb154e29958e2dc9673d632b82d3272cf7d8b6ba281af6fc8815abac045f

Aliases

arxiv: cs/0607008 · arxiv_version: cs/0607008v1 · doi: 10.48550/arxiv.cs/0607008 · pith_short_12: 3IO5WFKOFGKY · pith_short_16: 3IO5WFKOFGKY4LOJ · pith_short_8: 3IO5WFKO

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/3IO5WFKOFGKY4LOJM46WGK4C2M \
  | 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: da1ddb154e29958e2dc9673d632b82d3272cf7d8b6ba281af6fc8815abac045f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3943048e28e3796cc486bf72b23c6c822cdf2089f3478c9773d2bad1633f585",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.DM",
    "submitted_at": "2006-07-03T06:38:48Z",
    "title_canon_sha256": "d7cc01aa072c98fd39ee061eeadd9417ea41dd49dd5660f19cc04d66e712d4e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0607008",
    "kind": "arxiv",
    "version": 1
  }
}