Pith Number

pith:NZ3PGCQN

pith:2015:NZ3PGCQNG64Q7SG67GM4XBEEMO

not attested not anchored not stored refs pending

How unprovable is Rabin's decidability theorem?

Henryk Michalewski, Leszek Aleksander Ko{\l}odziejczyk

arxiv:1508.06780 v1 · 2015-08-27 · math.LO · cs.FL · 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{NZ3PGCQNG64Q7SG67GM4XBEEMO}

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	2026-05-18T01:34:41.083126Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e76f30a0d37b90fc8def999cb848463b2b45d3e2867ff9624110288b5e14716

Aliases

arxiv: 1508.06780 · arxiv_version: 1508.06780v1 · doi: 10.48550/arxiv.1508.06780 · pith_short_12: NZ3PGCQNG64Q · pith_short_16: NZ3PGCQNG64Q7SG6 · pith_short_8: NZ3PGCQN

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/NZ3PGCQNG64Q7SG67GM4XBEEMO \
  | 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: 6e76f30a0d37b90fc8def999cb848463b2b45d3e2867ff9624110288b5e14716

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d15617b1d5f2e03a0b0db34a9777560255454f984790678347d8a357fbddd60b",
    "cross_cats_sorted": [
      "cs.FL",
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-08-27T09:53:20Z",
    "title_canon_sha256": "fb386ce787008ca1a5ea9c1b2631819dff8104034b7cbbdcf8745ad66cd1cf52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.06780",
    "kind": "arxiv",
    "version": 1
  }
}