Pith Number

pith:53EN2IAO

pith:2021:53EN2IAOZTJV7LPNP2H6RPL66T

not attested not anchored not stored refs pending

Dynamic Membership for Regular Languages

Antoine Amarilli, Charles Paperman, Louis Jachiet

arxiv:2102.07728 v2 · 2021-02-15 · cs.FL · 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{53EN2IAOZTJV7LPNP2H6RPL66T}

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	2026-07-05T02:46:12.211348Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eec8dd200eccd35faded7e8fe8bd7ef4c6796d9c62de7308c218da48127ff8ca

Aliases

arxiv: 2102.07728 · arxiv_version: 2102.07728v2 · doi: 10.48550/arxiv.2102.07728 · pith_short_12: 53EN2IAOZTJV · pith_short_16: 53EN2IAOZTJV7LPN · pith_short_8: 53EN2IAO

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/53EN2IAOZTJV7LPNP2H6RPL66T \
  | 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: eec8dd200eccd35faded7e8fe8bd7ef4c6796d9c62de7308c218da48127ff8ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be6cb1592bc4905ebbc0b2826931c0e5540be1a15d1006f18a60df06f870fa42",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2021-02-15T18:25:48Z",
    "title_canon_sha256": "545badaab46bfbe3b346541e09e55a4f41412f8f532786fca38ce7a58cc2f422"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.07728",
    "kind": "arxiv",
    "version": 2
  }
}