Pith Number

pith:MQ23LHDA

pith:2026:MQ23LHDA2AI6DGYLC5Z4M673BM

not attested not anchored not stored refs pending

On the Counting Sequence of Z-convex Polyominoes

Luca Castelli (University of Insubria), Paolo Massazza (University of Insubria)

arxiv:2606.13158 v1 · 2026-06-11 · cs.DM · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MQ23LHDA2AI6DGYLC5Z4M673BM}

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	2026-06-12T01:09:43.983495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6435b59c60d011e19b0b1773c67bfb0b144690391cbe06f63c9a5c64d0a8bb2b

Aliases

arxiv: 2606.13158 · arxiv_version: 2606.13158v1 · doi: 10.48550/arxiv.2606.13158 · pith_short_12: MQ23LHDA2AI6 · pith_short_16: MQ23LHDA2AI6DGYL · pith_short_8: MQ23LHDA

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/MQ23LHDA2AI6DGYLC5Z4M673BM \
  | 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: 6435b59c60d011e19b0b1773c67bfb0b144690391cbe06f63c9a5c64d0a8bb2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89be6cb8543e7a2573f4acbc7a8f006d64116dd00e2a1fd74f57bf62e16d7b4f",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2026-06-11T10:27:55Z",
    "title_canon_sha256": "e02b938dfcb9d3cf2b997238540d162b4ce96bcf73d27ece36940ce58be60872"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.13158",
    "kind": "arxiv",
    "version": 1
  }
}