Pith Number

pith:XCNBATQV

pith:2020:XCNBATQVAQNX2XZWOJQC4LI2FK

not attested not anchored not stored refs pending

Fine-Grained Complexity of Regular Expression Pattern Matching and Membership

Philipp Schepper

arxiv:2008.02769 v2 · 2020-08-06 · cs.CC · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XCNBATQVAQNX2XZWOJQC4LI2FK}

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	2026-07-05T01:36:51.305821Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b89a104e15041b7d5f3672602e2d1a2aac27f031099aa7c2e53aadc84e20ca0f

Aliases

arxiv: 2008.02769 · arxiv_version: 2008.02769v2 · doi: 10.48550/arxiv.2008.02769 · pith_short_12: XCNBATQVAQNX · pith_short_16: XCNBATQVAQNX2XZW · pith_short_8: XCNBATQV

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/XCNBATQVAQNX2XZWOJQC4LI2FK \
  | 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: b89a104e15041b7d5f3672602e2d1a2aac27f031099aa7c2e53aadc84e20ca0f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0dc1ea1c18ef3a7b20aca7a88db09930b4d631a79b0cba277671fe57f5d1a47",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2020-08-06T17:13:58Z",
    "title_canon_sha256": "15e10e1eb898c6873d24c790618577048890e4d863c19dd04a9bebd451947a7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2008.02769",
    "kind": "arxiv",
    "version": 2
  }
}