Pith Number

pith:PZSNCIP5

pith:2013:PZSNCIP5VGY6WW3PO7HJK6CMFC

not attested not anchored not stored refs pending

On the least number of palindromes contained in an infinite word

Gabriele Fici, Luca Q. Zamboni

arxiv:1301.3376 v2 · 2013-01-15 · cs.DM · cs.FL · 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{PZSNCIP5VGY6WW3PO7HJK6CMFC}

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	2026-05-18T02:47:51.040872Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e64d121fda9b1eb5b6f77ce95784c28b4b4afdd004d95f633051416a201ad12

Aliases

arxiv: 1301.3376 · arxiv_version: 1301.3376v2 · doi: 10.48550/arxiv.1301.3376 · pith_short_12: PZSNCIP5VGY6 · pith_short_16: PZSNCIP5VGY6WW3P · pith_short_8: PZSNCIP5

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/PZSNCIP5VGY6WW3PO7HJK6CMFC \
  | 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: 7e64d121fda9b1eb5b6f77ce95784c28b4b4afdd004d95f633051416a201ad12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1503372a33eae1ae1b3ec465c3c924ce56eec8b86414035ff8af6b503fdbce2a",
    "cross_cats_sorted": [
      "cs.FL",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2013-01-15T15:04:04Z",
    "title_canon_sha256": "78be64c82cde468e9da393411173ec5f8687f3838fec4ff3c0883f6d32fb3adf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.3376",
    "kind": "arxiv",
    "version": 2
  }
}