Pith Number

pith:K6JWNOQX

pith:2007:K6JWNOQXEDQDTPGBRZZUIXHIKF

not attested not anchored not stored refs pending

Convex hulls of polyominoes

Sascha Kurz

arxiv:math/0702786 v1 · 2007-02-26 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K6JWNOQXEDQDTPGBRZZUIXHIKF}

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	2026-07-04T14:59:44.089626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

579366ba1720e039bcc18e73445ce85146f60c1b14532ff090f01d44ada6c320

Aliases

arxiv: math/0702786 · arxiv_version: math/0702786v1 · doi: 10.48550/arxiv.math/0702786 · pith_short_12: K6JWNOQXEDQD · pith_short_16: K6JWNOQXEDQDTPGB · pith_short_8: K6JWNOQX

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/K6JWNOQXEDQDTPGBRZZUIXHIKF \
  | 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: 579366ba1720e039bcc18e73445ce85146f60c1b14532ff090f01d44ada6c320

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7839a74d1309546caf29d5baa0714e214c30cd500ee02aee392dda776cc9cbd8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.CO",
    "submitted_at": "2007-02-26T15:29:00Z",
    "title_canon_sha256": "414302fbbe623b5731201a45716e7c10acaf7a53a736480d5e973771b74f937f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0702786",
    "kind": "arxiv",
    "version": 1
  }
}