Pith Number

pith:ZLEMLWMQ

pith:2022:ZLEMLWMQLFC7LNOT7YGJUKMZGT

not attested not anchored not stored refs pending

A hidden signal in Hofstadter's $H$ sequence

Rodrigo Angelo

arxiv:2206.00750 v1 · 2022-06-01 · math.NT · math.CO · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZLEMLWMQLFC7LNOT7YGJUKMZGT}

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	2026-07-05T04:28:33.311764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cac8c5d9905945f5b5d3fe0c9a299934fb933393da48cd73cb68320ce3fa7706

Aliases

arxiv: 2206.00750 · arxiv_version: 2206.00750v1 · doi: 10.48550/arxiv.2206.00750 · pith_short_12: ZLEMLWMQLFC7 · pith_short_16: ZLEMLWMQLFC7LNOT · pith_short_8: ZLEMLWMQ

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/ZLEMLWMQLFC7LNOT7YGJUKMZGT \
  | 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: cac8c5d9905945f5b5d3fe0c9a299934fb933393da48cd73cb68320ce3fa7706

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28766081a95239c5ca69d4958f8d84a5e48a892f635929f65239ab76a7a55943",
    "cross_cats_sorted": [
      "math.CO",
      "math.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2022-06-01T20:21:49Z",
    "title_canon_sha256": "4d6891e2a4bd0eb7c0f96f40178e6590ad384ecd156616cc31a71b7a3271170c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2206.00750",
    "kind": "arxiv",
    "version": 1
  }
}