Pith Number

pith:RJX5QMU4

pith:2008:RJX5QMU4RHIUFHXJWP3KZ4FTPO

not attested not anchored not stored refs pending

Solution of Peter Winkler's Pizza Problem

Jan Kyn\v{c}l, Josef Cibulka, Pavel Valtr, Rudolf Stola\v{r}, Viola M\'esz\'aros

arxiv:0812.4322 v1 · 2008-12-23 · 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{RJX5QMU4RHIUFHXJWP3KZ4FTPO}

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	2026-05-18T04:23:22.318680Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8a6fd8329c89d1429ee9b3f6acf0b37ba827712f2fcc2a3b9db074338bfbdffc

Aliases

arxiv: 0812.4322 · arxiv_version: 0812.4322v1 · doi: 10.48550/arxiv.0812.4322 · pith_short_12: RJX5QMU4RHIU · pith_short_16: RJX5QMU4RHIUFHXJ · pith_short_8: RJX5QMU4

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/RJX5QMU4RHIUFHXJWP3KZ4FTPO \
  | 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: 8a6fd8329c89d1429ee9b3f6acf0b37ba827712f2fcc2a3b9db074338bfbdffc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b0a3a901901a59e56e2d5d1cacb3a5fa95a79edac4da6bd71f68b7e6ef73a3c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2008-12-23T01:18:01Z",
    "title_canon_sha256": "cf86802cfdaa33ebdd18ded41b777a7b18c3b7c095f1589ca9d9b16e6b234247"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.4322",
    "kind": "arxiv",
    "version": 1
  }
}