Pith Number

pith:5XDENGOV

pith:2015:5XDENGOVQLTJAZKQFZ6YFZMCGA

not attested not anchored not stored refs pending

Avoiding two consecutive blocks of same size and same sum over $\mathbb{Z}^2$

Matthieu Rosenfeld, Micha\"el Rao

arxiv:1511.05875 v2 · 2015-11-18 · math.CO · cs.DM · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5XDENGOVQLTJAZKQFZ6YFZMCGA}

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	2026-05-18T01:03:36.766542Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edc64699d582e69065502e7d82e5823001a1a2de4151802c643313545f642676

Aliases

arxiv: 1511.05875 · arxiv_version: 1511.05875v2 · doi: 10.48550/arxiv.1511.05875 · pith_short_12: 5XDENGOVQLTJ · pith_short_16: 5XDENGOVQLTJAZKQ · pith_short_8: 5XDENGOV

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/5XDENGOVQLTJAZKQFZ6YFZMCGA \
  | 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: edc64699d582e69065502e7d82e5823001a1a2de4151802c643313545f642676

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38137bc32fd7e1e0ae3451113e88f60357cb1f34c12b4c8b02b258d27a280bd0",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-11-18T16:57:08Z",
    "title_canon_sha256": "33318b964dc3a0dcc85ff7b11592c80275df9f735f1fecf611f6015d7bd3bb8d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.05875",
    "kind": "arxiv",
    "version": 2
  }
}