Pith Number

pith:F4OAZJJ2

pith:2019:F4OAZJJ2AC6QI2PSHJMVGMGW7G

not attested not anchored not stored refs pending

Guarded Kleene Algebra with Tests: Verification of Uninterpreted Programs in Nearly Linear Time

Alexandra Silva, Dexter Kozen, Justin Hsu, Nate Foster, Steffen Smolka, Tobias Kapp\'e

arxiv:1907.05920 v4 · 2019-07-12 · cs.LO · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F4OAZJJ2AC6QI2PSHJMVGMGW7G}

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	2026-07-05T05:38:06.276252Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f1c0ca53a00bd0469f23a595330d6f986e8d406ccc333dd4633b76b257d6c58

Aliases

arxiv: 1907.05920 · arxiv_version: 1907.05920v4 · doi: 10.48550/arxiv.1907.05920 · pith_short_12: F4OAZJJ2AC6Q · pith_short_16: F4OAZJJ2AC6QI2PS · pith_short_8: F4OAZJJ2

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/F4OAZJJ2AC6QI2PSHJMVGMGW7G \
  | 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: 2f1c0ca53a00bd0469f23a595330d6f986e8d406ccc333dd4633b76b257d6c58

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a8d689d767777330e05a8b30c974ee3519f9fe1b3c6969f9dac588fb039da13",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-07-12T18:54:04Z",
    "title_canon_sha256": "4b863adb1235faea9141d832ca7ce6532f022848c06c155eeca29319c273886d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.05920",
    "kind": "arxiv",
    "version": 4
  }
}