Pith Number

pith:KHQQRINF

pith:2026:KHQQRINFZSN326TEKH3BGHJBVU

not attested not anchored not stored refs pending

Logics Containing wK4: Selection \`a la Fine

Niels C. Vooijs, Simon Santschi

arxiv:2606.31920 v1 · 2026-06-30 · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KHQQRINFZSN326TEKH3BGHJBVU}

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	2026-07-01T01:18:25.384271Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

51e108a1a5cc9bbd7a6451f6131d21ad18ba7ae094a77be43ccc5c6289ca44cc

Aliases

arxiv: 2606.31920 · arxiv_version: 2606.31920v1 · doi: 10.48550/arxiv.2606.31920 · pith_short_12: KHQQRINFZSN3 · pith_short_16: KHQQRINFZSN326TE · pith_short_8: KHQQRINF

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/KHQQRINFZSN326TEKH3BGHJBVU \
  | 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: 51e108a1a5cc9bbd7a6451f6131d21ad18ba7ae094a77be43ccc5c6289ca44cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4425b197d6e01c25495182567d12eed23431c8b7542f818ac83c52298931bcc",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2026-06-30T16:26:57Z",
    "title_canon_sha256": "2845fc04dda3d449b4f4f3d3694c2a67491ad754ffe6696661f0cba1328c2001"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.31920",
    "kind": "arxiv",
    "version": 1
  }
}