Pith Number

pith:KESXRJ45

pith:2011:KESXRJ45SPQ5JDOMGAGKWNU4PH

not attested not anchored not stored refs pending

Decision Problems for Recognizable Languages of Infinite Pictures

Olivier Finkel (ELM)

arxiv:1107.5896 v1 · 2011-07-29 · math.LO · cs.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{KESXRJ45SPQ5JDOMGAGKWNU4PH}

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	2026-05-18T04:16:30.475337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

512578a79d93e1d48dcc300cab369c79e3ad6ae6e45f2af2485eedff5ec52d15

Aliases

arxiv: 1107.5896 · arxiv_version: 1107.5896v1 · doi: 10.48550/arxiv.1107.5896 · pith_short_12: KESXRJ45SPQ5 · pith_short_16: KESXRJ45SPQ5JDOM · pith_short_8: KESXRJ45

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/KESXRJ45SPQ5JDOMGAGKWNU4PH \
  | 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: 512578a79d93e1d48dcc300cab369c79e3ad6ae6e45f2af2485eedff5ec52d15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc16004cb32d2d9a4a22e892c4f2adae97432801f04b2198da7f530abc1d7423",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2011-07-29T08:48:07Z",
    "title_canon_sha256": "3645eeff65fdd5371d78b0489aa709ab7464c2530dc86be7857e89175c7152aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.5896",
    "kind": "arxiv",
    "version": 1
  }
}