Pith Number

pith:VBB6EXB6

pith:2013:VBB6EXB6MQSHBFKWDBLJBIW3IE

not attested not anchored not stored refs pending

Partially Directed Snake Polyominoes

Alain Goupil, J\'er\^ome de Wouters d'Oplinter, Marie-Eve Pellerin

arxiv:1307.8432 v2 · 2013-07-31 · 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{VBB6EXB6MQSHBFKWDBLJBIW3IE}

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	2026-05-18T02:49:28.861777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a843e25c3e6424709556185690a2db410f03e513bfd7fea50bc226ea9fe592d9

Aliases

arxiv: 1307.8432 · arxiv_version: 1307.8432v2 · doi: 10.48550/arxiv.1307.8432 · pith_short_12: VBB6EXB6MQSH · pith_short_16: VBB6EXB6MQSHBFKW · pith_short_8: VBB6EXB6

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/VBB6EXB6MQSHBFKWDBLJBIW3IE \
  | 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: a843e25c3e6424709556185690a2db410f03e513bfd7fea50bc226ea9fe592d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3e5994410d155ab7b5ede7d4491d3251646037de429bb9c15679d46ebbde8449",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-07-31T19:20:44Z",
    "title_canon_sha256": "2f16568e3739379e2141d04e9ca88e021305ad77af461d9e27b017f79f5d154a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.8432",
    "kind": "arxiv",
    "version": 2
  }
}