Pith Number

pith:YLJTME6H

pith:2017:YLJTME6HCCYLIT7HOMIROU7NDZ

not attested not anchored not stored refs pending

Separability by Piecewise Testable Languages is PTime-Complete

Tom\'a\v{s} Masopust

arxiv:1704.07856 v2 · 2017-04-25 · 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{YLJTME6HCCYLIT7HOMIROU7NDZ}

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	2026-05-18T00:30:22.222618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2d33613c710b0b44fe773111753ed1e7c9c0dee7f20f9b064ecaafca6ef7da2

Aliases

arxiv: 1704.07856 · arxiv_version: 1704.07856v2 · doi: 10.48550/arxiv.1704.07856 · pith_short_12: YLJTME6HCCYL · pith_short_16: YLJTME6HCCYLIT7H · pith_short_8: YLJTME6H

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/YLJTME6HCCYLIT7HOMIROU7NDZ \
  | 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: c2d33613c710b0b44fe773111753ed1e7c9c0dee7f20f9b064ecaafca6ef7da2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6362475f0d5346800067d8a486d867aee68291325f43a6226c3ef0a121c34a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2017-04-25T18:24:50Z",
    "title_canon_sha256": "7cc54108410c469b725f7eb08059355e2462b9493892e38942153d9da3090f18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.07856",
    "kind": "arxiv",
    "version": 2
  }
}