Pith Number

pith:WVZTI3EW

pith:2014:WVZTI3EWSLCCRLQFXNHHJMUB37

not attested not anchored not stored refs pending

Upper-Bounding Proof Length with the Busy Beaver

Gustavo Lacerda

arxiv:1406.1808 v1 · 2014-06-06 · 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{WVZTI3EWSLCCRLQFXNHHJMUB37}

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	2026-05-18T02:50:12.489256Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b573346c9692c428ae05bb4e74b281dfc390d837047f83e766b1697c0c5edfc5

Aliases

arxiv: 1406.1808 · arxiv_version: 1406.1808v1 · doi: 10.48550/arxiv.1406.1808 · pith_short_12: WVZTI3EWSLCC · pith_short_16: WVZTI3EWSLCCRLQF · pith_short_8: WVZTI3EW

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/WVZTI3EWSLCCRLQFXNHHJMUB37 \
  | 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: b573346c9692c428ae05bb4e74b281dfc390d837047f83e766b1697c0c5edfc5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "66af3940d4aa314c04ba7cbc55631c01d3c325b51294cd734d3e3029a9dd32de",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2014-06-06T20:14:50Z",
    "title_canon_sha256": "dd248e6f10c46cebae3af811acf3bad2e3fb36be956cc74921e48020d9eacbc9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1406.1808",
    "kind": "arxiv",
    "version": 1
  }
}