Pith Number

pith:BVWHQZYR

pith:2025:BVWHQZYR7AIASKZQ2GORJYGGXM

not attested not anchored not stored refs pending

Negated String Containment is Decidable (Technical Report)

Luk\'a\v{s} Hol\'ik, Michal He\v{c}ko, Ond\v{r}ej Leng\'al, Vojt\v{e}ch Havlena

arxiv:2506.22061 v2 · 2025-06-27 · 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{BVWHQZYR7AIASKZQ2GORJYGGXM}

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	2026-07-05T11:30:02.804160Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d6c786711f810092b30d19d14e0c6bb159db95be62fcbae8634d223d0d78747

Aliases

arxiv: 2506.22061 · arxiv_version: 2506.22061v2 · doi: 10.48550/arxiv.2506.22061 · pith_short_12: BVWHQZYR7AIA · pith_short_16: BVWHQZYR7AIASKZQ · pith_short_8: BVWHQZYR

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/BVWHQZYR7AIASKZQ2GORJYGGXM \
  | 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: 0d6c786711f810092b30d19d14e0c6bb159db95be62fcbae8634d223d0d78747

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb39eb27876c1280058f055e6d174819794b04d67b46d6247cd914f0b3606aa6",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2025-06-27T09:56:36Z",
    "title_canon_sha256": "2d9beffcd428ff311db1d527c904d2e64bf3b660100b1af55a86c78165d28f93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.22061",
    "kind": "arxiv",
    "version": 2
  }
}