Pith Number

pith:HI7TTZV5

pith:2011:HI7TTZV5F4Y6VJYMZQ23O6K5NY

not attested not anchored not stored refs pending

Three Applications to Rational Relations of the High Undecidability of the Infinite Post Correspondence Problem in a Regular omega-Language

Olivier Finkel (ELM)

arxiv:1107.5886 v1 · 2011-07-29 · 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{HI7TTZV5F4Y6VJYMZQ23O6K5NY}

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	2026-05-18T03:31:54.467911Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a3f39e6bd2f31eaa70ccc35b7795d6e2970a72b1c53f8b248c122c97de179b4

Aliases

arxiv: 1107.5886 · arxiv_version: 1107.5886v1 · doi: 10.48550/arxiv.1107.5886 · pith_short_12: HI7TTZV5F4Y6 · pith_short_16: HI7TTZV5F4Y6VJYM · pith_short_8: HI7TTZV5

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/HI7TTZV5F4Y6VJYMZQ23O6K5NY \
  | 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: 3a3f39e6bd2f31eaa70ccc35b7795d6e2970a72b1c53f8b248c122c97de179b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca1d3d0bf5ad5b981ae45376a05895b68fbab459eeb5771e6b91ba954552ee24",
    "cross_cats_sorted": [
      "cs.CC",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2011-07-29T07:15:04Z",
    "title_canon_sha256": "153d73a84438dc0a7f8b52a6e2e58eab9d498af9d6a5b5708befbc806a651ea3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.5886",
    "kind": "arxiv",
    "version": 1
  }
}