Pith Number

pith:2E3RK72W

pith:2026:2E3RK72WKLDW7CBTD44J4NTHBD

not attested not anchored not stored refs pending

Efficient Regex Matching with Sparse Counting-Sets

Brink van der Merwe (Stellenbosch University), Martin Berglund (Ume{\aa} University), Sicheol Sung (Yonsei University)

arxiv:2606.26679 v1 · 2026-06-25 · 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{2E3RK72WKLDW7CBTD44J4NTHBD}

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	2026-06-26T01:15:56.633218Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d137157f5652c76f88331f389e366708d25d5c49aabb42438aa3b71bc1167026

Aliases

arxiv: 2606.26679 · arxiv_version: 2606.26679v1 · doi: 10.48550/arxiv.2606.26679 · pith_short_12: 2E3RK72WKLDW · pith_short_16: 2E3RK72WKLDW7CBT · pith_short_8: 2E3RK72W

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/2E3RK72WKLDW7CBTD44J4NTHBD \
  | 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: d137157f5652c76f88331f389e366708d25d5c49aabb42438aa3b71bc1167026

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "302a4e06fc70955661fa8582dec3b93d51422c41b4d00b32c45984c6cc7b88ed",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2026-06-25T07:13:19Z",
    "title_canon_sha256": "ed58d8ef18ed48d66380d2da6cf517accca86d270cd2956f3f38177bac1bedd6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.26679",
    "kind": "arxiv",
    "version": 1
  }
}