Pith Number

pith:34X2TLMX

pith:2018:34X2TLMXALFLDKQ7FKU5O7NGLX

not attested not anchored not stored refs pending

Complexity and (un)decidability of fragments of $\langle \omega^{\omega^\lambda}; \times \rangle$

Alexis B\`es, Christian Choffrut

arxiv:1803.01418 v2 · 2018-03-04 · cs.LO · 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{34X2TLMXALFLDKQ7FKU5O7NGLX}

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	2026-05-18T00:16:50.084532Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df2fa9ad9702cab1aa1f2aa9d77da65dee964205e81d98250a3394ab1d32567a

Aliases

arxiv: 1803.01418 · arxiv_version: 1803.01418v2 · doi: 10.48550/arxiv.1803.01418 · pith_short_12: 34X2TLMXALFL · pith_short_16: 34X2TLMXALFLDKQ7 · pith_short_8: 34X2TLMX

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/34X2TLMXALFLDKQ7FKU5O7NGLX \
  | 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: df2fa9ad9702cab1aa1f2aa9d77da65dee964205e81d98250a3394ab1d32567a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5386521301b58e5f3ca4391a20c6f3f46f417499e36233016ae2422b6f059868",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2018-03-04T20:54:25Z",
    "title_canon_sha256": "cf61022bc0fc519a7e7a22b05d9965eefd32059fe4f20633082101ee788f0910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.01418",
    "kind": "arxiv",
    "version": 2
  }
}