Pith Number

pith:BLSVU6J4

pith:2011:BLSVU6J4RTSOLY3NP7YIKZND32

not attested not anchored not stored refs pending

A decidable characterization of locally testable tree languages

Luc Segoufin (INRIA & ENS Cachan), Thomas Place (ENS Cachan & INRIA)

arxiv:1109.5851 v2 · 2011-09-27 · 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{BLSVU6J4RTSOLY3NP7YIKZND32}

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	2026-05-18T01:37:39.223078Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ae55a793c8ce4e5e36d7ff08565a3deab971236d7f46371d136d9ef6cfea344

Aliases

arxiv: 1109.5851 · arxiv_version: 1109.5851v2 · doi: 10.48550/arxiv.1109.5851 · pith_short_12: BLSVU6J4RTSO · pith_short_16: BLSVU6J4RTSOLY3N · pith_short_8: BLSVU6J4

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/BLSVU6J4RTSOLY3NP7YIKZND32 \
  | 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: 0ae55a793c8ce4e5e36d7ff08565a3deab971236d7f46371d136d9ef6cfea344

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1386e263cf3c404a2aff436a0689628c0b959de054165ae647f4e527f7d119aa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2011-09-27T12:08:37Z",
    "title_canon_sha256": "c75744abbfc644812aca448357a6ce44a48163a44c8aa7fcad0cd9833be9353a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5851",
    "kind": "arxiv",
    "version": 2
  }
}