Pith Number

pith:JO5QPRK4

pith:2013:JO5QPRK4QSE2AWFQ2T7YXAROPO

not attested not anchored not stored refs pending

A Coloring Problem for Infinite Words

Aldo de Luca, Elena V. Pribavkina, Luca Q. Zamboni

arxiv:1307.2828 v4 · 2013-07-10 · 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{JO5QPRK4QSE2AWFQ2T7YXAROPO}

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	2026-05-18T02:55:39.107504Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4bbb07c55c8489a058b0d4ff8b822e7b8a3146322370b6cd027910f213ade9b2

Aliases

arxiv: 1307.2828 · arxiv_version: 1307.2828v4 · doi: 10.48550/arxiv.1307.2828 · pith_short_12: JO5QPRK4QSE2 · pith_short_16: JO5QPRK4QSE2AWFQ · pith_short_8: JO5QPRK4

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/JO5QPRK4QSE2AWFQ2T7YXAROPO \
  | 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: 4bbb07c55c8489a058b0d4ff8b822e7b8a3146322370b6cd027910f213ade9b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54c370b2fbb23d6b626a5c3cf6096007c64a077f3356a221d98017927453f3c2",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-07-10T15:32:31Z",
    "title_canon_sha256": "d6f04707306c0cd5666970a1c48657d814cbb20af34230d3e26c074a6d7fc14a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2828",
    "kind": "arxiv",
    "version": 4
  }
}