Pith Number

pith:5UAU7TIF

pith:2017:5UAU7TIF65RCXAEXTIBDVAPK5F

not attested not anchored not stored refs pending

A Polynomial Time Match Test for Large Classes of Extended Regular Expressions

Daniel Reidenbach, Markus L. Schmid

arxiv:1707.04097 v1 · 2017-07-13 · 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{5UAU7TIF65RCXAEXTIBDVAPK5F}

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	2026-05-18T00:40:22.655019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ed014fcd05f7622b80979a023a81eae9668414528a04596bde89ccd13e4fa03d

Aliases

arxiv: 1707.04097 · arxiv_version: 1707.04097v1 · doi: 10.48550/arxiv.1707.04097 · pith_short_12: 5UAU7TIF65RC · pith_short_16: 5UAU7TIF65RCXAEX · pith_short_8: 5UAU7TIF

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/5UAU7TIF65RCXAEXTIBDVAPK5F \
  | 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: ed014fcd05f7622b80979a023a81eae9668414528a04596bde89ccd13e4fa03d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca7b6d1b492550829edd2b5da89fbef88863e2d4dde7de95467772b51cea2574",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2017-07-13T12:54:12Z",
    "title_canon_sha256": "23fce8d48611501f4aefda5373df9f9b8727237450cbf877ee44cc0019fc6489"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.04097",
    "kind": "arxiv",
    "version": 1
  }
}