Pith Number

pith:S2TI4YJG

pith:2011:S2TI4YJGCFB3K6KZUK37LJEH4F

not attested not anchored not stored refs pending

A variant of Hofstadter's sequence and finite automata

J.-P. Allouche, J. Shallit

arxiv:1103.1133 v2 · 2011-03-06 · math.NT · 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{S2TI4YJGCFB3K6KZUK37LJEH4F}

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	2026-05-18T04:20:12.853503Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96a68e61261143b57959a2b7f5a487e15ba9c04bd06449954eb0212bbc7d5ea5

Aliases

arxiv: 1103.1133 · arxiv_version: 1103.1133v2 · doi: 10.48550/arxiv.1103.1133 · pith_short_12: S2TI4YJGCFB3 · pith_short_16: S2TI4YJGCFB3K6KZ · pith_short_8: S2TI4YJG

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/S2TI4YJGCFB3K6KZUK37LJEH4F \
  | 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: 96a68e61261143b57959a2b7f5a487e15ba9c04bd06449954eb0212bbc7d5ea5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b4c82c978bdf40879583842d61eecf07f96be1bda4e5856ee4c88798f8d24b8",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2011-03-06T16:12:37Z",
    "title_canon_sha256": "a78678f4d74277e20aa874d81b868d080213405cd3278273c147a67eab78334b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.1133",
    "kind": "arxiv",
    "version": 2
  }
}