Pith Number

pith:ZZNNKGGM

pith:2018:ZZNNKGGMQLQ3Q22HNJKIYOXTTV

not attested not anchored not stored refs pending

Deterministic Regular Expressions With Back-References

Dominik D. Freydenberger, Markus L. Schmid

arxiv:1802.01508 v1 · 2018-02-05 · cs.FL · 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{ZZNNKGGMQLQ3Q22HNJKIYOXTTV}

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	2026-05-18T00:24:25.710101Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce5ad518cc82e1b86b476a548c3af39d56fa9718d3f43076ed9a2c3f71e469f9

Aliases

arxiv: 1802.01508 · arxiv_version: 1802.01508v1 · doi: 10.48550/arxiv.1802.01508 · pith_short_12: ZZNNKGGMQLQ3 · pith_short_16: ZZNNKGGMQLQ3Q22H · pith_short_8: ZZNNKGGM

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/ZZNNKGGMQLQ3Q22HNJKIYOXTTV \
  | 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: ce5ad518cc82e1b86b476a548c3af39d56fa9718d3f43076ed9a2c3f71e469f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d1e53d05dd8265ea01f763e367df17f0e035452b580e2fcc8595c0022b1fa8f5",
    "cross_cats_sorted": [
      "cs.DB"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2018-02-05T16:47:45Z",
    "title_canon_sha256": "04edb55583cb6f07426bd6b470bc8c13e2de2ab05179916c802a4b6af1e86505"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.01508",
    "kind": "arxiv",
    "version": 1
  }
}