Pith Number

pith:SOZA44L6

pith:2015:SOZA44L6DRQCO5QATJDPLIR3DI

not attested not anchored not stored refs pending

Pattern avoidance is not P-recursive

Igor Pak, Scott Garrabrant

arxiv:1505.06508 v1 · 2015-05-25 · math.CO · cs.CC · 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{SOZA44L6DRQCO5QATJDPLIR3DI}

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.

Cited by

1 paper in Pith

Uncountably many enumerations of well-quasi-ordered permutation classes

Receipt and verification

First computed	2026-05-18T02:03:44.803748Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93b20e717e1c602776009a46f5a23b1a248d4fd85a5beba4a46dc7dcf4f12d75

Aliases

arxiv: 1505.06508 · arxiv_version: 1505.06508v1 · doi: 10.48550/arxiv.1505.06508 · pith_short_12: SOZA44L6DRQC · pith_short_16: SOZA44L6DRQCO5QA · pith_short_8: SOZA44L6

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/SOZA44L6DRQCO5QATJDPLIR3DI \
  | 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: 93b20e717e1c602776009a46f5a23b1a248d4fd85a5beba4a46dc7dcf4f12d75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "53a2598ba1d93bcef7a0c62fd34ac4d3e9e648c7ff26ef47ab71998277350274",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-05-25T01:11:09Z",
    "title_canon_sha256": "1620bcab4d273128e27c7e969498587c549794faae6899f94169ce6afd98ac59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.06508",
    "kind": "arxiv",
    "version": 1
  }
}