Pith Number

pith:MTRRTUET

pith:2008:MTRRTUET23FVZLWMZYD3TQ6CSX

not attested not anchored not stored refs pending

Topological Complexity of Context-Free omega-Languages: A Survey

IMJ, LIP), Olivier Finkel (ELM

arxiv:0806.1413 v2 · 2008-06-09 · cs.LO · cs.CC · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MTRRTUET23FVZLWMZYD3TQ6CSX}

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	2026-05-18T03:31:07.285675Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

64e319d093d6cb5caeccce07b9c3c295d02c227e8f9a0731a618b52d50df2615

Aliases

arxiv: 0806.1413 · arxiv_version: 0806.1413v2 · doi: 10.48550/arxiv.0806.1413 · pith_short_12: MTRRTUET23FV · pith_short_16: MTRRTUET23FVZLWM · pith_short_8: MTRRTUET

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/MTRRTUET23FVZLWMZYD3TQ6CSX \
  | 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: 64e319d093d6cb5caeccce07b9c3c295d02c227e8f9a0731a618b52d50df2615

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02754d684eb3c4fd5c8fa4b872b700580fdf81406ff5a3cec266e589ff5d9b71",
    "cross_cats_sorted": [
      "cs.CC",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2008-06-09T10:03:44Z",
    "title_canon_sha256": "9a7a52ef628febb90d7b5aaa63e19e07da3aaccfb8638d4639167f609fd7fc76"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.1413",
    "kind": "arxiv",
    "version": 2
  }
}