Pith Number

pith:V5BK6ZIE

pith:2011:V5BK6ZIECHPLY6DUZ2XDVNPGTN

not attested not anchored not stored refs pending

Parameterized Regular Expressions and their Languages

Juan Reutter, Leonid Libkin, Pablo Barcel\'o

arxiv:1107.0577 v1 · 2011-07-04 · 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{V5BK6ZIECHPLY6DUZ2XDVNPGTN}

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	2026-05-18T02:21:43.518763Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

af42af650411debc7874ceae3ab5e69b56c6275062fa59d8a0664a313b32fd68

Aliases

arxiv: 1107.0577 · arxiv_version: 1107.0577v1 · doi: 10.48550/arxiv.1107.0577 · pith_short_12: V5BK6ZIECHPL · pith_short_16: V5BK6ZIECHPLY6DU · pith_short_8: V5BK6ZIE

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/V5BK6ZIECHPLY6DUZ2XDVNPGTN \
  | 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: af42af650411debc7874ceae3ab5e69b56c6275062fa59d8a0664a313b32fd68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f4d567a21e3cb37bf4bb50835924a7a4a2af1805daf982c5e7887337aad274a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2011-07-04T09:50:01Z",
    "title_canon_sha256": "c03df8f68c787f8e7907ee50e2ab4047ddfeda81051a91d12a5d01ba4e90db31"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.0577",
    "kind": "arxiv",
    "version": 1
  }
}