Pith Number

pith:QXX4XQSM

pith:2018:QXX4XQSMBEDCC4NM3YTHHOOHJQ

not attested not anchored not stored refs pending

Skew Poincar\'e-Birkhoff-Witt extensions over weak $\Sigma$-rigid rings

Armando Reyes, H\'ector Su\'arez

arxiv:1805.11982 v1 · 2018-05-29 · math.QA · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QXX4XQSMBEDCC4NM3YTHHOOHJQ}

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	2026-05-18T00:14:35.565348Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85efcbc24c09062171acde2673b9c74c156e517a1969028e113f8ef46ad6ee2f

Aliases

arxiv: 1805.11982 · arxiv_version: 1805.11982v1 · doi: 10.48550/arxiv.1805.11982 · pith_short_12: QXX4XQSMBEDC · pith_short_16: QXX4XQSMBEDCC4NM · pith_short_8: QXX4XQSM

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/QXX4XQSMBEDCC4NM3YTHHOOHJQ \
  | 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: 85efcbc24c09062171acde2673b9c74c156e517a1969028e113f8ef46ad6ee2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fc7689e8f6dc67ab58131b06de369052a0aa394e51cbd241b62090e2a3fc08ec",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.QA",
    "submitted_at": "2018-05-29T11:55:07Z",
    "title_canon_sha256": "2d43a00c7f0c88f760932293eaa600ed2acf568982c0239ba2c4a6917afd4daa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.11982",
    "kind": "arxiv",
    "version": 1
  }
}