Pith Number

pith:EFYRLTMZ

pith:2015:EFYRLTMZSJM4E7P74XTBWOIY6Z

not attested not anchored not stored refs pending

Simple Polyominoes are Prime

Akihiro Shikama, Ayesha Asloob Qureshi, Takafumi Shibuta

arxiv:1501.05107 v2 · 2015-01-21 · math.AC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EFYRLTMZSJM4E7P74XTBWOIY6Z}

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	2026-05-18T02:28:53.613607Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

217115cd999259c27dffe5e61b3918f66c2d7bf43623ad182732173682444601

Aliases

arxiv: 1501.05107 · arxiv_version: 1501.05107v2 · doi: 10.48550/arxiv.1501.05107 · pith_short_12: EFYRLTMZSJM4 · pith_short_16: EFYRLTMZSJM4E7P7 · pith_short_8: EFYRLTMZ

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/EFYRLTMZSJM4E7P74XTBWOIY6Z \
  | 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: 217115cd999259c27dffe5e61b3918f66c2d7bf43623ad182732173682444601

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eccd1d9910764ba3f446a4e09c6d5ca3a19a689491964f20d639d9361327f98b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AC",
    "submitted_at": "2015-01-21T09:50:26Z",
    "title_canon_sha256": "534b5244ed970a09310b082c0ba866d7dd43e71109e1714b52b3dec280c93531"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.05107",
    "kind": "arxiv",
    "version": 2
  }
}