Pith Number

pith:KLH3XGOF

pith:2018:KLH3XGOF7IAXJH7WPBUVXSCQP2

not attested not anchored not stored refs pending

$\aleph_0$-categoricity of semigroups

Thomas Quinn-Gregson, Victoria Gould

arxiv:1802.05703 v2 · 2018-02-15 · math.LO · math.RA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KLH3XGOF7IAXJH7WPBUVXSCQP2}

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	2026-05-18T00:23:11.263987Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

52cfbb99c5fa01749ff678695bc8507e956a880e9d5716277b86c9b43e5a6fd0

Aliases

arxiv: 1802.05703 · arxiv_version: 1802.05703v2 · doi: 10.48550/arxiv.1802.05703 · pith_short_12: KLH3XGOF7IAX · pith_short_16: KLH3XGOF7IAXJH7W · pith_short_8: KLH3XGOF

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/KLH3XGOF7IAXJH7WPBUVXSCQP2 \
  | 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: 52cfbb99c5fa01749ff678695bc8507e956a880e9d5716277b86c9b43e5a6fd0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1c2548ec81c80069548e0e72648520c92c0c862c17d1c84e0fa4e8cc983da5a",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-02-15T18:53:56Z",
    "title_canon_sha256": "98b73096e6935aa2f0413b8345d7f38ebce657f0057c73609c635ba49c179c7d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.05703",
    "kind": "arxiv",
    "version": 2
  }
}