Pith Number

pith:QEQ7DOF7

pith:2019:QEQ7DOF7I3CESJEIKZ7QUTQRCI

not attested not anchored not stored refs pending

On pseudo-involutions, involutions and quasi-involutions in the group of almost Riordan arrays

Nikolaos Pantelidis, Paul Barry

arxiv:1901.03734 v1 · 2019-01-11 · 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{QEQ7DOF7I3CESJEIKZ7QUTQRCI}

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	2026-05-17T23:56:27.141601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8121f1b8bf46c4492488567f0a4e111202c3589bd9d031d7ef68713dec14de18

Aliases

arxiv: 1901.03734 · arxiv_version: 1901.03734v1 · doi: 10.48550/arxiv.1901.03734 · pith_short_12: QEQ7DOF7I3CE · pith_short_16: QEQ7DOF7I3CESJEI · pith_short_8: QEQ7DOF7

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/QEQ7DOF7I3CESJEIKZ7QUTQRCI \
  | 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: 8121f1b8bf46c4492488567f0a4e111202c3589bd9d031d7ef68713dec14de18

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9722818109633356f53759485e0751dee9e357db1e960774acde95d42326242",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-01-11T20:23:07Z",
    "title_canon_sha256": "5bab81e49a572da5323dc5f136d535734c323196107f2153d3d54f74c0531eb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03734",
    "kind": "arxiv",
    "version": 1
  }
}