Pith Number

pith:CBBF5VNF

pith:2026:CBBF5VNFTBCYSEK7PS4HZBENKX

not attested not anchored not stored refs pending

In How Many Ways can a Rectangle be Rectangled?

Doron Zeilberger, Natalya Ter-Saakov, Pablo Blanco, Robert Dougherty-Bliss

arxiv:2606.05439 v1 · 2026-06-03 · 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{CBBF5VNFTBCYSEK7PS4HZBENKX}

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	2026-06-05T00:13:57.931710Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10425ed5a5984589115f7cb87c848d55f8890d240e5abeee667d9343aaba4e72

Aliases

arxiv: 2606.05439 · arxiv_version: 2606.05439v1 · doi: 10.48550/arxiv.2606.05439 · pith_short_12: CBBF5VNFTBCY · pith_short_16: CBBF5VNFTBCYSEK7 · pith_short_8: CBBF5VNF

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/CBBF5VNFTBCYSEK7PS4HZBENKX \
  | 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: 10425ed5a5984589115f7cb87c848d55f8890d240e5abeee667d9343aaba4e72

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "689b0d9dc320906391a0ca58bd10730e47409f2410ffe96b6fc134934b114488",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2026-06-03T21:01:55Z",
    "title_canon_sha256": "da947ad30dca119d500fd8b92f049c96374972c8955cd72d6d723b34d146c938"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.05439",
    "kind": "arxiv",
    "version": 1
  }
}