Pith Number

pith:PDUAGS22

pith:2018:PDUAGS22DWL4YP2ZCMRAOCXSZR

not attested not anchored not stored refs pending

Kleene Algebra with Observations

Alexandra Silva, Fabio Zanasi, Jana Wagemaker, Jurriaan Rot, Paul Brunet, Tobias Kapp\'e

arxiv:1811.10401 v4 · 2018-11-16 · cs.LO · 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{PDUAGS22DWL4YP2ZCMRAOCXSZR}

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	2026-07-05T05:38:06.120224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

78e8034b5a1d97cc3f591322070af2cc7215dcc272539f81453c47f656121408

Aliases

arxiv: 1811.10401 · arxiv_version: 1811.10401v4 · doi: 10.48550/arxiv.1811.10401 · pith_short_12: PDUAGS22DWL4 · pith_short_16: PDUAGS22DWL4YP2Z · pith_short_8: PDUAGS22

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/PDUAGS22DWL4YP2ZCMRAOCXSZR \
  | 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: 78e8034b5a1d97cc3f591322070af2cc7215dcc272539f81453c47f656121408

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e5e2d8df1b84a45f5758e0344847f800104963d5a2d4cff88ba0d9b03df5f8c1",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2018-11-16T16:56:43Z",
    "title_canon_sha256": "e85a3a783046ae92e438b5651e65e9e730e2b76d8e012045b12c75d700be4b28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.10401",
    "kind": "arxiv",
    "version": 4
  }
}