Pith Number

pith:2S3CPA5Z

pith:2018:2S3CPA5Z6G5YSHTZDBIBRJ44XF

not attested not anchored not stored refs pending

Siblings of an $\aleph_0$-categorical relational structure

Claude Laflamme, Maurice Pouzet, Norbert Sauer, Robert Woodrow

arxiv:1811.04185 v2 · 2018-11-10 · 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{2S3CPA5Z6G5YSHTZDBIBRJ44XF}

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	2026-05-17T23:44:58.573795Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4b62783b9f1bb891e79185018a79cb94c890ca6dcede186faa14450120776c5

Aliases

arxiv: 1811.04185 · arxiv_version: 1811.04185v2 · doi: 10.48550/arxiv.1811.04185 · pith_short_12: 2S3CPA5Z6G5Y · pith_short_16: 2S3CPA5Z6G5YSHTZ · pith_short_8: 2S3CPA5Z

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/2S3CPA5Z6G5YSHTZDBIBRJ44XF \
  | 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: d4b62783b9f1bb891e79185018a79cb94c890ca6dcede186faa14450120776c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d285e97ea870db3c39484d005759465db9257422e4191166788486829794c42",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-11-10T03:46:02Z",
    "title_canon_sha256": "64f4c019019cf5823f245ec8e9cd6a4c2acfcbf5b58d118c3f7ca9a285341abf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.04185",
    "kind": "arxiv",
    "version": 2
  }
}