Pith Number

pith:CLLU5XOU

pith:2020:CLLU5XOU2L64JFCSFKWQAI4WBM

not attested not anchored not stored refs pending

A Relational Matrix Algebra and its Implementation in a Column Store

Michael H. Boehlen, Nikolaus Augsten, Oksana Dolmatova

arxiv:2004.05517 v1 · 2020-04-12 · cs.DB

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CLLU5XOU2L64JFCSFKWQAI4WBM}

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	2026-07-05T00:54:37.841565Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

12d74eddd4d2fdc494522aad0023960b0598e0fd13865a02fb5c416b33da7df2

Aliases

arxiv: 2004.05517 · arxiv_version: 2004.05517v1 · doi: 10.48550/arxiv.2004.05517 · pith_short_12: CLLU5XOU2L64 · pith_short_16: CLLU5XOU2L64JFCS · pith_short_8: CLLU5XOU

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/CLLU5XOU2L64JFCSFKWQAI4WBM \
  | 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: 12d74eddd4d2fdc494522aad0023960b0598e0fd13865a02fb5c416b33da7df2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74ce013f30b7cb389a997359122eb348249e31beba1832ade1c0409dba30f89d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2020-04-12T00:59:09Z",
    "title_canon_sha256": "77f64b65d4b71993723f8353a477fea8dff6720c7e9bb26e180f4f1588e13ac2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.05517",
    "kind": "arxiv",
    "version": 1
  }
}