Pith Number

pith:BACHLYXY

pith:2013:BACHLYXY7FY6IWFSR5XC3SKJGE

not attested not anchored not stored refs pending

Containment of Nested Regular Expressions

Juan L. Reutter

arxiv:1304.2637 v2 · 2013-04-09 · cs.DB

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BACHLYXY7FY6IWFSR5XC3SKJGE}

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.

Cited by

1 paper in Pith

The Equational Theory of Relational Kleene Algebra with Graph Loop is PSPACE-Complete

Receipt and verification

First computed	2026-05-18T03:20:35.009423Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

080475e2f8f971e458b28f6e2dc949313182682a1d7dcb7f702e28a7a0eb0a97

Aliases

arxiv: 1304.2637 · arxiv_version: 1304.2637v2 · doi: 10.48550/arxiv.1304.2637 · pith_short_12: BACHLYXY7FY6 · pith_short_16: BACHLYXY7FY6IWFS · pith_short_8: BACHLYXY

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/BACHLYXY7FY6IWFSR5XC3SKJGE \
  | 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: 080475e2f8f971e458b28f6e2dc949313182682a1d7dcb7f702e28a7a0eb0a97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "371c85facb14aa63444def54420eec21bc6410d8703692df59af438a15154d4e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2013-04-09T15:40:21Z",
    "title_canon_sha256": "0f116c50a32c71cc3619eda97b5a2aae54dfe4030d65f5b485ee76f07d91c770"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2637",
    "kind": "arxiv",
    "version": 2
  }
}