Pith Number

pith:IPL2M7KK

pith:2015:IPL2M7KKWGRB2NVAUEVREZ6NBE

not attested not anchored not stored refs pending

Cross-bifix-free sets in two dimensions

Antonio Bernini, Elena Barcucci, Renzo Pinzani, Stefano Bilotta

arxiv:1502.05275 v1 · 2015-02-18 · cs.DM · 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{IPL2M7KKWGRB2NVAUEVREZ6NBE}

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	2026-05-18T02:26:52.057537Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

43d7a67d4ab1a21d36a0a12b1267cd090dccec7bf699a48ac5176306155cee60

Aliases

arxiv: 1502.05275 · arxiv_version: 1502.05275v1 · doi: 10.48550/arxiv.1502.05275 · pith_short_12: IPL2M7KKWGRB · pith_short_16: IPL2M7KKWGRB2NVA · pith_short_8: IPL2M7KK

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/IPL2M7KKWGRB2NVAUEVREZ6NBE \
  | 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: 43d7a67d4ab1a21d36a0a12b1267cd090dccec7bf699a48ac5176306155cee60

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5387666ef709fe68cb19001269ae8aeb7f6ba6fa9ba655cf70e6e65b383af08b",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2015-02-18T15:33:43Z",
    "title_canon_sha256": "97ee0fd811339bdef73e2934ba3610823d0dde3d796014c77d7f8ebd5e2b385f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.05275",
    "kind": "arxiv",
    "version": 1
  }
}