Pith Number

pith:VDBZVBLS

pith:2015:VDBZVBLS4MCYQSEOKUKG3YL3HA

not attested not anchored not stored refs pending

Generalized Eilenberg Theorem I: Local Varieties of Languages

Henning Urbat, Jiri Adamek, Robert Myers, Stefan Milius

arxiv:1501.02834 v1 · 2015-01-12 · cs.FL · cs.LO · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VDBZVBLS4MCYQSEOKUKG3YL3HA}

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	2026-05-18T02:29:17.016836Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8c39a8572e30588488e55146de17b383337770f87cc259d02ed8eff0bcb5b5e

Aliases

arxiv: 1501.02834 · arxiv_version: 1501.02834v1 · doi: 10.48550/arxiv.1501.02834 · pith_short_12: VDBZVBLS4MCY · pith_short_16: VDBZVBLS4MCYQSEO · pith_short_8: VDBZVBLS

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/VDBZVBLS4MCYQSEOKUKG3YL3HA \
  | 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: a8c39a8572e30588488e55146de17b383337770f87cc259d02ed8eff0bcb5b5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "623c5e887a3bf0373311b0fa9c55a304fc35bfd303b3f24b53443fc23879dea3",
    "cross_cats_sorted": [
      "cs.LO",
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2015-01-12T21:48:01Z",
    "title_canon_sha256": "d45866803e5bacf90dbd713392366e332c5ac0cc80b93065964c2a9fb6a73ac8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.02834",
    "kind": "arxiv",
    "version": 1
  }
}