Pith Number

pith:A7JID55Q

pith:2004:A7JID55QKHJLHTL4AH3QDTCVXX

not attested not anchored not stored refs pending

A note on two identities arising from enumeration of convex polyominoes

Jiang Zeng, Victor J. W. Guo

arxiv:math/0412015 v3 · 2004-12-01 · 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{A7JID55QKHJLHTL4AH3QDTCVXX}

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	2026-05-18T04:26:00.778702Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

07d281f7b051d2b3cd7c01f701cc55bdd803a1e1cf9e90ec630f25ded07a0dba

Aliases

arxiv: math/0412015 · arxiv_version: math/0412015v3 · doi: 10.48550/arxiv.math/0412015 · pith_short_12: A7JID55QKHJL · pith_short_16: A7JID55QKHJLHTL4 · pith_short_8: A7JID55Q

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/A7JID55QKHJLHTL4AH3QDTCVXX \
  | 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: 07d281f7b051d2b3cd7c01f701cc55bdd803a1e1cf9e90ec630f25ded07a0dba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4274cc1176756ca79f6755122d8dccbc8433f12a8000e64809a3e4d202a2cd5d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.CO",
    "submitted_at": "2004-12-01T10:50:35Z",
    "title_canon_sha256": "bc73aebaafbc01d2e9bdbdd64bac2590399f619fef5a4bf6a2eaad3f0b99d753"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0412015",
    "kind": "arxiv",
    "version": 3
  }
}